Why No One Has Measured The Speed Of Light

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Veritasium

Veritasium

Күн бұрын

Пікірлер: 113 000
@brstrom1914
@brstrom1914 3 жыл бұрын
My bank uses the same theory, but vice versa. When the money leaves my debit card, it goes really fast. When something is to be repaid, it takes much longer.
@MARCO-rq2ph
@MARCO-rq2ph 3 жыл бұрын
XD
@fancygamer5896
@fancygamer5896 3 жыл бұрын
Underrated comment lol
@rosauradiaz9842
@rosauradiaz9842 3 жыл бұрын
Oh, same here
@novusmundi9131
@novusmundi9131 3 жыл бұрын
It is, for bank, a convenient model to embrace. You'd be a banker, you'd do the same ! Now , of course, you don't believe Einstein really had any clue what was the speed of light. The number just fell into his hat. Actually Morley and Michaelson were trying in 1887 to measure the speed of light. But the 'ether" screwed up everything. Einstein just took M&M experiment result and declared that "ether" does not exist, and that froze everything in place including the speed of light.
@jedpeltier3320
@jedpeltier3320 3 жыл бұрын
LOL my bank is involved in this inverse of equities and is complicit as far as I'm concerned....I speak into existence and impose the maximum penalty for their impetulance with the application of the converse of consequence to the algorithms restricting my transactions and unleash the acholaids of irreverence to expand and proliferate the funds available to be unlimited everyday and to exponentially grow... please and thank you :)
@smartereveryday
@smartereveryday 4 жыл бұрын
This was a very fun present to unwrap. When you called me and told me to turn the camera on I knew something weird was going to happen and you certainly delivered. As long as I’ve known you Derek you’ve been destroying assumptions. Thank you for this friendship. It’s certainly enjoyable from my perspective.
@daenite2480
@daenite2480 4 жыл бұрын
Aaand subscribed
@dylancorkindale
@dylancorkindale 4 жыл бұрын
First
@cjyt4115
@cjyt4115 4 жыл бұрын
13 seconds ago
@homunculus3646
@homunculus3646 4 жыл бұрын
hey Dustin!
@VellianoRosso
@VellianoRosso 4 жыл бұрын
Use quantum entanglement
@CGPGrey
@CGPGrey 4 жыл бұрын
Great video. Despite getting a physics degree and teaching physics for years, I never came across this or thought about it. I was treating the video mostly as a 'fun to think about' sort of video, but your point at the end is really intriguing.
@josephburchanowski4636
@josephburchanowski4636 4 жыл бұрын
Even after watching the video, I have a few questions. What terrifies me the most about the questions, isn't that I think that they'll find a way to solve the one way speed of light; but the fact that if I am thinking about these questions, someone else likely has already, and there is a reason these questions don't answer it, and when I try thinking of the reasons, it makes the whole concept seem even more bizarre than it already is. For instance, we are trying to measure the speed of light in a vacuum. But we could also measure the speed of light in a medium; intuitively there should be a relation between them. But the intuition must be wrong right? Or at least unverifiable. Which means even with an instantaneous vacuum speed of light one way, and a 0.5c vacuum speed of light the other way, there is some very strong asymmetrical physics going on when light goes through a medium. Even if I have a medium that slows light down to a crawl, there has to be a reason it doesn't show the asymmetricity in the speed of light. There also has to be a problem with colliding objects at relativistic speeds, due to the vastly changed special relativity formula. Two objects with the same insane kinetic energy relative to their stationary mass, can be travelling at two vastly different speeds depending on which direction they are traveling. One could be moving near instantaneously, while the other can be moving just below half c. Intuitively there must be some way you could use this information to solve the problem; but the intuition must be wrong, otherwise it wouldn't be an open ended problem. Probably the reason things act so asymmetrically weird if the speed of light in a vacuum is asymmetric, is because that isn't "just the speed of light", it is the speed of causality. It means cause and effect acts different speeds in different directions; and there is no experiment you can do that can get past the limitations of cause and effect. All physics basically goes bonkers such that the asymmetrical speeds will always work out. ---------------------------------------------- Anyways, other than my mind breaking, I do agree that the end of the video is very intriguing. A solution to figuring out if the speed of causality is asymmetrical or not, could exist in a unifying theory. So the mind breaking isn't all for not. Or perhaps the concept turns out to be pointless. As what does it mean if the speed of causality is different in two different directions? What is differences in time and space even mean if causality is different in two directions, aren't time and space dependent on causality. Perhaps the entire paradox of asymmetric speed of light is dependent on our own ignorantly rigid view of space and time? And thus unifying theory will have nothing to do with answering our fallacy of a question? Ugh, my head. Anyways, I can always find solace in that Hexagons are the bestagons.
@amon7816
@amon7816 4 жыл бұрын
Hexagon = Bestagon
@andu2oo6
@andu2oo6 4 жыл бұрын
I made a separate comment, but no one replied so ...here it goes: "I honestly have no idea what I am talking about, but ... can you use quantum entanglement to measure the speed of light somehow? The entangled particles are "already synced", so "hit" the one "far away" with "something" that changes it's state and observe it/measure the time on the one "near" you... and do the same speed of light test from/in all "directions", then just compare the times to see if it's the same. Only objection I could find to this not working is that I have no idea what breaks entanglement, so stuff like lasers, photons, whatever ... might not break it. In rest, it seems like a good idea. Obviously I am wrong, or else it would of been tried by now, but I would really like an answer for this, if someone could educate me. Like I said I have no idea what I am talking about, so don't jump me. :)"
@thijsmas1359
@thijsmas1359 4 жыл бұрын
Okay, I have a question is the solution of 10:00 in multiple ways correct to verify de one-way speed of light okay hear me out. 1. If you do this and film both the clocks you can see which one turned on the fastest. Or which one is further. Once again you need to time it perfectly by turning on the cameras at the same time. But this one could be possible 2. If you move the middle clock to the left or the right you would get another result out of it if the speed of the light is different if not you have done it. To this correct you nee to set the clock on both sides at 300 meters away from the middle I hope my English wasn’t that bad and that you understood my brain thoughts
@drozdovkonstantin
@drozdovkonstantin 4 жыл бұрын
Think one more time: "are distances AB and BA the same or they are measured in terms of light traveling time?" and you will get your sanity back. You can easily simulate the entire special relativity universe defining your (name A) causal boundary as now. It looks like "c0 towards you is \inf", and "c1 away from you is c/2" and for every BA synchronization event all time travel distances pointing to you are just zero, and still (c0 dt0)^2 = dr^2 = (c1 dt1)^2 the metric invariant your coordinates must obey. This kind of "absolute" distance independent from your speed of light choice came from you actually postulated the object B being at the same location for AB and BA synchronization events but how can you define "the same point" within the experiment? Observer from Pluto will surely note your signals were sent and received at different points of space. And here comes the answer: how can you measure any kind of "directional" speed of light if you can not provide the same distances in different directions?
@jamesr4208
@jamesr4208 Ай бұрын
I am an RF engineer. We use the two way speed of light to determine the wavelength of a radio wave. We use the wavelength to define the lengths of transmission lines to do things like impedance transformation. Although, these applications only involve the one way speed of light, the applications still function as if the one way speed of light were exactly the same as the two way speed of light.
@erlindar7410
@erlindar7410 14 күн бұрын
Do the 3 way speed of light to get a rough estimate to prove that it dosen't travel instantly on some bend.
@InsaneSibs
@InsaneSibs 8 күн бұрын
That's actually a proof itself. This video doesn't make much sense to me. There was also synchronized pendulum that can be used to time clocks together as pendulums sync by mechanical energy
@DownToTheWire0
@DownToTheWire0 5 күн бұрын
@@erlindar7410 The three way speed of light has the same problem as the one-way speed of light. How do you synchronize the clocks?
@DownToTheWire0
@DownToTheWire0 5 күн бұрын
@@InsaneSibs The pendulums wouldn't be perfectly synced. The pendulums would always be slightly not synced up just because they transfer energy to each other at the speed of sound, way slower than the speed of light.
@priyathgregory9055
@priyathgregory9055 3 жыл бұрын
Should have wrote this in my physics exams, "It is neither a supposition, nor a hypothesis, but a stipulation that I can make of my own free will"
@gasun1274
@gasun1274 3 жыл бұрын
i still believe that 1 is prime
@ghostoftheuchiha526
@ghostoftheuchiha526 3 жыл бұрын
@@gasun1274 0 is odd
@lesserevil8136
@lesserevil8136 3 жыл бұрын
Definitely would have gotten your word count up
@finmat95
@finmat95 3 жыл бұрын
0 is positive
@ShopperPlug
@ShopperPlug 3 жыл бұрын
Lets be honest or make a bet... when the time comes, it will be proven that the speed of light is same for both directions, its pretty obvious. Right now "Veritasium" got the free hall pass for making wild assumptions since speed of light can't be measured with synced clocks.
@markm8188
@markm8188 4 жыл бұрын
My real takeaway is that two clocks, regardless of precision, will never be truly synchronized. This explains why I am frequently late.
@markm8188
@markm8188 4 жыл бұрын
@Steven Moore Since I am the moving observer, it's my timepiece that runs slower. Only when traffic is unusually light can these relativistic effects be mitigated. It's just physics.
@seanzhang3873
@seanzhang3873 4 жыл бұрын
That’s what I told my boss for getting late at work, and I got fired...
@zxuiji
@zxuiji 4 жыл бұрын
Would like but your count fits into 8 bits exactly, don't wanna be the one to change that :) *Edit* Damn someone changed it, oh well, added the like now it no longer fits into a perfect 0xFF
@icedefundthepol8770
@icedefundthepol8770 4 жыл бұрын
@@markm8188 ...but are you...or are you the observed standing still...
@yeetmeat_
@yeetmeat_ 4 жыл бұрын
I think about that all the time, how two things can’t be happening at the same time, EXCEPT for two things touching each other.
@rigel442
@rigel442 3 жыл бұрын
Light: "My speed is immeasurable, and my time is ruined"
@brankelly1921
@brankelly1921 3 жыл бұрын
That's..... actually quite brilliant 😐
@sinpi314
@sinpi314 3 жыл бұрын
Underrated comment!
@realo3503
@realo3503 3 жыл бұрын
@@sinpi314 yes it is
@pardeepgarg2640
@pardeepgarg2640 3 жыл бұрын
Lmao 🤣😂🤣 You made me laugh so much 😂😂😂
@justharshad2044
@justharshad2044 3 жыл бұрын
WOW
@titux5604
@titux5604 Ай бұрын
The part where you talked about distant objects, since we see the same type of galaxies in their early life in all directions. That proves that if there is any difference, it would be extremely small.
@jokcho5
@jokcho5 Ай бұрын
Direction of light is the same - its moving towards you and not away.
@foop145
@foop145 Ай бұрын
I had the same thought, but it still has the same issue. Unless we're wrong about the big bang, it means any galaxies 13+ billion light years away started more or less at the same point as the matter that comprises us. If the ancient galaxies off our north pole are instantly sending their light back to us, they've also been under severe time dilation as they've moved away from us for 13+ billion years, which means they've evolved far more slowly than the galaxies off our south pole. Our real time view of them shows them in their proto stages, which is exactly what we would see if the speed of light was the same in all directions. There's just no way to avoid a two way trip and maintain any kind of certainty about simultaneity. Even if we assume the big bang didn't happen, everything is still moving away from us, which serves to counteract any lopsided c shenanigans.
@flyingrobotpig
@flyingrobotpig Ай бұрын
​@@foop145This answered my remaining questions about that scenario, thank you! Time dilation is such a wild concept to me I love it!
@ninehundreddollarluxuryyac5958
@ninehundreddollarluxuryyac5958 17 сағат бұрын
Also redshift being the same in all directions would be another "one way" measurement proving there is no preferred direction. A preferred direction would show up as one side of the sky redshifted more than the other. Redshift is an analog of travel time because it takes time for the space between the star and here to expand, causing the redshift.
@davidcr487
@davidcr487 15 сағат бұрын
@@ninehundreddollarluxuryyac5958this is the answer to this video. The redshift being basically homogeneous means light must travel the same from all directions.
@TheRealGuywithoutaMustache
@TheRealGuywithoutaMustache 3 жыл бұрын
I swear this channel is a gold mine for educational and entertaining content
@AquarialTV
@AquarialTV 3 жыл бұрын
Indeed
@Frilabird
@Frilabird 3 жыл бұрын
True
@justsomeguywithoutamustach8695
@justsomeguywithoutamustach8695 3 жыл бұрын
Very much so
@hiruharii
@hiruharii 3 жыл бұрын
Why are you watching this on the same day I am
@AquarialTV
@AquarialTV 3 жыл бұрын
@@hiruharii the comment man works in mysterious ways
@v10011011
@v10011011 3 жыл бұрын
I love how he called it right off the bat, “oh you’re talking relativity, you’re gonna something weird aren’t you?”
@RileyBanksWho
@RileyBanksWho 3 жыл бұрын
"You're gonna something weird" This sentence makes me confused and or scared.
@Chadwicktrumpet
@Chadwicktrumpet 3 жыл бұрын
So is the speed of shadow the same as the speed of light?
@bradbarker8527
@bradbarker8527 3 жыл бұрын
Quay
@Kristian-ql8zw
@Kristian-ql8zw 3 жыл бұрын
@@Chadwicktrumpet No
@TheMelbournelad
@TheMelbournelad 3 жыл бұрын
@@Kristian-ql8zw but why is it not that speed. That is the question
@Lightning-Shock
@Lightning-Shock 3 жыл бұрын
I know for a fact that the speed of light depends on direction, because sometimes when I sit at a traffic light I can see the BMW driver behind me flashing before I see the light turning green.
@yogi30303
@yogi30303 3 жыл бұрын
I don't think the difference can be felt/measured through humanly senses. That bmw guy is flashing before it turns green.
@glinchdk
@glinchdk 3 жыл бұрын
@@yogi30303 that is the joke.
@yogi30303
@yogi30303 3 жыл бұрын
@@glinchdk yeah I guess among all the serious comments I took this seriously too.
@Majesticbro
@Majesticbro 3 жыл бұрын
@@yogi30303 r/swooosh
@AcidArmy_
@AcidArmy_ 3 жыл бұрын
@@Majesticbro r/slamdunk
@ninehundreddollarluxuryyac5958
@ninehundreddollarluxuryyac5958 17 сағат бұрын
Light from distant stars is red shifted the same amount in all directions. If you are seeing light from one direction instantaneously, it wasn't travelling long enough to get red shifted at all because the space between us and the star would not have expanded at all in that (lack of) time. Even a small "preferred direction effect" would add redshift to one side of the sky and lessen it on the other. This is a one-way analog that allows comparison in all directions. You're welcome, I hope this puts your mind at ease on the topic. If you are still skeptical, explain why, because redshift requires time as far as I know.
@ristopaasivirta9770
@ristopaasivirta9770 4 жыл бұрын
I like the extra effort you put into the short acting parts to visualize the concepts.
@Raythe
@Raythe 4 жыл бұрын
Have a big clock display of a super accurate clock suspended on a roof or tower. Aim two cameras at this display. Let the clock run, its start time doesn.t matter. Have the first camera triggered instantly, the second camera triggered by a beam of light activated the same time as the first camera. Compare the photos to see yhe time difference. Depending on how powerful the camera, depends on how far away you could feasibly place the static clock and second camera
@higorss
@higorss 4 жыл бұрын
@@Raythe But how both cameras will activate in the same time?
@ProblemFactory
@ProblemFactory 3 жыл бұрын
@@Raythe but because the speed of light is different for different directions, two cameras will see differently delayed images so that the time difference you see in the images will be c.
@tmylve3495
@tmylve3495 4 жыл бұрын
I love when Destin is presented with something he genuinely didn't know/understand before. His face lights up with extreme excitement and intrigue.
@boycy69
@boycy69 4 жыл бұрын
That moment led me to evaluate my whole existence on whether I could share something interesting enough to impress Destin that much.
@sykoteddy
@sykoteddy 2 ай бұрын
THAT is EXACTLY how scientists should reackt and be, and not make something a constant because they can't understand it.
@bent.5687
@bent.5687 4 жыл бұрын
"So someone has measured the speed of light...or have they?" Huge Vsauce moment right there
@VivekYadav-ds8oz
@VivekYadav-ds8oz 4 жыл бұрын
They both never really were the same after the "Is anything Random?" collab.
@controlequebrado4455
@controlequebrado4455 4 жыл бұрын
Or were they?
@MikeTaffet
@MikeTaffet 4 жыл бұрын
*vibrophone intensifies*
@joesimamura223
@joesimamura223 4 жыл бұрын
what about quantum entangle ment to start the two clocks on both sides
@ViratKohli-jj3wj
@ViratKohli-jj3wj 4 жыл бұрын
@Windigo Jones that is why you watch flat earth videos lol
@Any-Warrior
@Any-Warrior 15 күн бұрын
This is amazing, I already knew this problem, but no one has ever been able to explain it so well. Congratulations to the channel.😊
@godzillaxred
@godzillaxred 4 жыл бұрын
4:06 - "Or have they?" I feel like this was a missed chance to put the vsauce theme on
@kagebushinmailru
@kagebushinmailru 4 жыл бұрын
Also noticed VSause referenceh
@physicsrox184
@physicsrox184 4 жыл бұрын
Here kzbin.info/www/bejne/moLaZapvjMyLmbM
@JanSeewald
@JanSeewald 4 жыл бұрын
this is depressing here the right url kzbin.info/www/bejne/rqamgGpjebF2l6M
@Justakatto
@Justakatto 4 жыл бұрын
Moon Men by Jake Chudnow (Vsauce theme) - kzbin.info/www/bejne/in-VZpqeoMuah6M
@Necrodzentelmenel1
@Necrodzentelmenel1 4 жыл бұрын
kzbin.info/www/bejne/j5jMqop9rq-Wf8U
@fr3nchy226
@fr3nchy226 3 жыл бұрын
This is the best explanation of "WHEN WILL THEN BE NOW?" I've ever seen.
@kimberlystratton7585
@kimberlystratton7585 3 жыл бұрын
Isnt it the best 'lack of explanation' of 'WHEN WILL THEN BE NOW'? **i really like your point
@gavros9636
@gavros9636 3 жыл бұрын
Soon.
@jordanammons4851
@jordanammons4851 3 жыл бұрын
Get two clocks that are 100 meters away from each other. Start them at the same time. Shoot a light across from one clock to the other. When the light reaches the first clock it will stop. When the light reaches the second clock it will stop. You have 2 times and you subtract them to find one. And convert to the larger scale
@gavros9636
@gavros9636 3 жыл бұрын
@@jordanammons4851 How do you start them at the same time?
@Yrvo12345
@Yrvo12345 3 жыл бұрын
@@jordanammons4851 2:07
@MrBaconbyte
@MrBaconbyte 3 жыл бұрын
thanks for giving me another thought I can't talk to most people about cause they'll just say I'm crazy.
@kilmersklassiskakanal
@kilmersklassiskakanal 3 жыл бұрын
yeah xD also with the gravity video
@r3kpwner303
@r3kpwner303 3 жыл бұрын
They probably don't even have the intelligence to understand what you are telling them so it's easier for their little brains to consider you crazy than to accept that they are stupid.
@logangentry2365
@logangentry2365 3 жыл бұрын
Toooo true
@firstnamelastname8790
@firstnamelastname8790 3 жыл бұрын
This is just him wanting to think is so smart conjecturing that c is different one way than the other
@moochoopr9551
@moochoopr9551 3 жыл бұрын
@@r3kpwner303 Not true. People have different things to focus. No one has the capability to be smart in every thing. Debunk this: There is no way to measure a people's intelligence.
@georgesackinger2002
@georgesackinger2002 Ай бұрын
As usual, a brilliant, thought provoking video. Thanks and I look forward to more.
@Vitor-gz6fn
@Vitor-gz6fn 3 жыл бұрын
I love that all these guys are friends and all they care about is figuring stuff out, learning and showing us.
@MarchelloMastrayani
@MarchelloMastrayani 3 жыл бұрын
They couldn’t care less about figuring stuff out. All of these stupid ideas are absolutely incorrect, and have been put to grave with actual experiments over 100 years ago All they care about is showing their sponsors how many people watch their anti scientific horseshit Go buy some kiwico and support the huckster
@MarchelloMastrayani
@MarchelloMastrayani 3 жыл бұрын
@Zach Comstock me and 11K other people who actually studied Physics The rest of you should go buy kiwico
@MusicNewb
@MusicNewb 3 жыл бұрын
@@MarchelloMastrayani I'm actually interested in reading the experiment. Do you have any reference to papers that I could follow through?
@MarchelloMastrayani
@MarchelloMastrayani 3 жыл бұрын
@@MusicNewb absolutely, there were two brilliant scientists who set out to measure the difference of the speed of light in different directions over 100 years ago. Their names were Michelson and Morley and if you search “Michelson-Morley experiment” you will find many articles because what they have measured was an important stepping stone in the history of Physics
@sonjaschellevis188
@sonjaschellevis188 3 жыл бұрын
@@ENikolaev huh
@feedmyintellect
@feedmyintellect 4 жыл бұрын
Thank you for putting a camera on Destin when you had this conversation with him. I wanted to see his pondering/puzzled face so much! 😁😁😁
@justamanofculture12
@justamanofculture12 4 жыл бұрын
We* wanted
@johnnyregs2378
@johnnyregs2378 4 жыл бұрын
When a physicist comes to an engineer with a question: "OH you're gonna do something weird arent ya?"
@creatorboii3012
@creatorboii3012 4 жыл бұрын
+Science Revolution I see but the whole religion thing is better than science is defunct
@Heero5308
@Heero5308 4 жыл бұрын
Thing this deep makes me question the existence of this very video. Really.
@BruceNitroxpro
@BruceNitroxpro 4 жыл бұрын
@Science Revolution , You list SO many things which are not true here that I won't bother to point them out. You might as well be traveling instantaneously.
@joselucas9398
@joselucas9398 4 жыл бұрын
@Science Revolution If you write an article and prove that mathematically, you could actually become a reputed scientist. Go ahead and do that. That's the beauty of science, all scientist have that in their minds, a sentence that says: "we could be wrong, and we probably are". We have like 3 centuries of science and look around you, look what they've already done! 300 hundred years is nothing compared to the time that our species is in the planet and absolutely nothing compared to the age of Earth itself. Stop comparing Science to Religions, they have nothing to do with each other.
@sashishekhar8266
@sashishekhar8266 4 жыл бұрын
Guys don't reply to that revolution guy,he/she literally mass spams this exact paragraph on all science related channel nowadays along with bunch of his flat earther friends, Well he's/she's literally questioning the very science which is allowing him/her to watch this video on his/her device, it's like if Elon Musk's son starts saying neuralink is fake. I was watching a video where a psychiatrist explains why these kinda people exists who claim the earth that it's flat or all the theories are bs , it's like they want to feel special as if they possess a knowledge which is hidden from the general public,it's like the film 2012 where only few people knew about what will happen actually in the start ,these want to get a feeling like that forgetting the difference between real life and Christopher Nolan's fiction scriptures , however this is also a state of mental illness which must be treated and not like back in 1700s when if someone started seeing ghosts , people started excorism or drowned him/her in the water lol
@VamseeRayaprolu
@VamseeRayaprolu 11 күн бұрын
Happy Birthday, Derek! You are a beacon of light in this dark, dark world.
@DJejbarros
@DJejbarros 3 жыл бұрын
"so someone has measured the speed of light... or have they?" Hey, Vsauce... Michael here
@arjunsubrahmanian7535
@arjunsubrahmanian7535 3 жыл бұрын
Hahaha exactly!
@hiftylonghead892
@hiftylonghead892 3 жыл бұрын
You look like vsauce but mexican
@Jacobcr93
@Jacobcr93 3 жыл бұрын
Lol
@thedra9ongod
@thedra9ongod 3 жыл бұрын
xD
@mangckyatmamon
@mangckyatmamon 3 жыл бұрын
VSalsa
@Birginio420
@Birginio420 4 жыл бұрын
He said "or have they?" I was kinda sad no vsauce music played
@HideFromIt
@HideFromIt 4 жыл бұрын
yea
@mahirshyam4127
@mahirshyam4127 4 жыл бұрын
If the pulse to start the second clock us traveling at the speed of light(2:27), then why can't you just subtract the number of seconds the second clock has been running for from the first? I feel like this is a stupid question and I'm missing something...
@BillAnt
@BillAnt 4 жыл бұрын
I know, right?! At 4:05 I thought I was watching a Vsauce video. lol
@HaydenTheEeeeeeeeevilEukaryote
@HaydenTheEeeeeeeeevilEukaryote 4 жыл бұрын
@@mahirshyam4127 because if the speed of light is potentially different in both directions, then how could they know how much to subtract it by? The experiment would be trying to measure the speed of light, but you’d need to know the speed of light in order to know how much to subtract the second clock by. For example, imagine trying to solve for the length of the hypotenuse of a right triangle, but the only information you’re given is the length of the bottom leg. Asking why you can’t just subtract the speed of light from the clocks to get the answer would be kind of like saying “why not use the length of the bottom leg and *the length of the hypotenuse* to find the other leg? Then from there, just use this other leg to find *the length of the hypotenuse.”* Hopefully this example makes sense, I’m not the best at explaining things.
@kartikchaturvedi7146
@kartikchaturvedi7146 4 жыл бұрын
yeahhhh
@TheRealMirCat
@TheRealMirCat 4 жыл бұрын
"We've invented an FTL drive but you can only turn left."
@ConceptHut
@ConceptHut 4 жыл бұрын
Lol
@ConceptHut
@ConceptHut 4 жыл бұрын
If you turn right you go backwards.
@WilliamAndrea
@WilliamAndrea 4 жыл бұрын
It's not an ambi-turner!
@showcase-me
@showcase-me 4 жыл бұрын
Douglas Adams Likes this comment!!!
@corwinchristensen260
@corwinchristensen260 4 жыл бұрын
NASCAR is going to have to build bigger tracks...
@WS12658
@WS12658 20 күн бұрын
I think a lot of people will watch this and have the attitude of "well of course it's the same in every direction, why wouldn't it be?" which I lean towards. But the point at the end is the most important part. The fact we can't measure the one-way speed of light is itself a huge clue (possibly) about how the universe works that is staring us in the face.
@jptbaba
@jptbaba 3 жыл бұрын
That’s why going to work feels like a drag and coming home feels quick.
@tarunyelakanti4710
@tarunyelakanti4710 3 жыл бұрын
Lol
@hoangphatnguyen3271
@hoangphatnguyen3271 3 жыл бұрын
Hahaha
@ShadoryKaine
@ShadoryKaine 3 жыл бұрын
I know this is a witty joke but there's a video about this kinda time where u feel vs time that is real in vsauce
@babylebron6119
@babylebron6119 3 жыл бұрын
The answer is easy, if u wanna measure the time delay in one direction, u send an impulse between this two clock's in each of this two directions and u will see if one starts later .... Quick maths
@averagejoe9040
@averagejoe9040 3 жыл бұрын
@@babylebron6119 I'll take it you didnt watch the whole video when you wrote this. He explains that the problem is that it remains unknown if light travels the same speed in all directions.
@mcmamad
@mcmamad 4 жыл бұрын
"Speed of light is the universe's refresh rate." -Stephan Wolfram
@minerscale
@minerscale 4 жыл бұрын
Has that got to do with his physics project?
@a.yashwanth
@a.yashwanth 4 жыл бұрын
speed = distance/time refresh rate = 1/time
@AP05_
@AP05_ 4 жыл бұрын
YES LOL
@Jahooliix
@Jahooliix 4 жыл бұрын
I haven’t got to the end yet but can you use some kind of quantum entanglement trigger in the future.
@samusam5853
@samusam5853 4 жыл бұрын
Are we living in a simulator?😢
@vibhavaggarwal237
@vibhavaggarwal237 6 ай бұрын
I am an engineer and was working on time synchronization between two devices on the same network. We encountered cases where network delay from A to B is higher than from B to A and such cases resulted in inaccurate synchronization. I was working on solving this problem and after watching your video I realized it’s essentially the same concept- sending signals from earth to mars is like sending network packets from A to B. So the conclusion was, without the help of any external device it’s impossible to accurately sync time! Thanks a lot for your video :))
@MrLoonzy
@MrLoonzy 6 ай бұрын
How does this affect the light year as a measure of distance. everyone is fascinated by it as it, because the observations of the star Betelgeuse for example, suggest that it is ready to explode into a supernova, but what we are observing occurred 600+ years ago?? I've also seen deep space observations of a binary star system when one of the stars occults it's twin for over 10 minutes, which blocked the light completely, it wasn't picked up by the sensors.. but as they eventually moved and came back to view, it was instant... i think that was 1000's of light years from earth, so why was it instantly seen and formed the same histogram reading it was prior to the occultation. I'm no expert it has all fascinated me since i was a kid, so if you have any ideas, or let me know if ive got this all wrong.
@rainmansound1
@rainmansound1 6 ай бұрын
We dont need a clock at all. We shine a laser moving at the receiver at a speed of 100 km/ h and observe a Doppler shift in blue. We do the same thing from the opposite side, we observe exactly the same displacement. Congratulations! The speed of light is the same in both directions :))) Easy.
@vibhavaggarwal237
@vibhavaggarwal237 6 ай бұрын
@@rainmansound1 you need clocks to measure the speed of 100km/h. And if the speed of light is different in different directions, your measured speed of 100km/h will also be “actually” different
@kukivave
@kukivave 5 ай бұрын
But we can synchronize clocks across vast distances (this is the whole reason GPS works, every clock in the GPS network is Synchronized because they know their exact position and relative velocity to other satellites, thus they can adjust their internal clocks to negate time dilation... because they have synchronized time, their beams to GPS devices with their exact time stamps, allows the GPS device to exactly calculate how long it took for that beam to reach the device from the orbiting satellite and thus we have very high precision triangulation of location... all because these satellites have synchronized time.... The thing Veratsirum is blatantly ignoring is that the reason two clocks "can't" be trusted is because relative to each other, their individual velocities results in time dilation, but this time dilation can be compensated for because we have the equations for general relativity(how we can synchronize GPS)... What he's saying is a barrier to recording the speed of light in one direction, is actually proof that the speed of light is the same in all directions and not just a convention.... TIME DIALATION.... even if the speed of light in one direction is slower than the speed of light in another.... Special Relativity tells us that Time Dialation kicks in... This will expand and contract space time in either direction, so that the resulting measurement (Distance of time) will always = C... this will happen by either contracting space, or elongating time, but the result will always come out at C (and is proven experimentally, as well as the basis of much of our technology for space travel, GPS, and quantum sciences)....
@glenspringle7337
@glenspringle7337 5 ай бұрын
That a crazy good example! Network delays could definitely be different in each direction.
@MCRuCr
@MCRuCr Ай бұрын
When you remember that time and space are actually linked in spacetime, it's rather unsurprising that it is hard to align / synchronize time when spacial distance is large. The concepts of simultaneity and spacial proximity are the same thing in spacetime. Further, I don't think that photons actually fly through space for a specific amount of time "until" they reach us. The existance of photons is only ever relevant when we interact with them. In a way, the "observed" photons/light are the interaction between an atom of a far star and an atom in the retina. This interaction could be computed by the "universe engine" in the same "time"step /instantly.
@___________2204
@___________2204 3 жыл бұрын
after years of religiously watching you when i was in high school, and as i am now about to finish a computer engineering degree, i would like to thank you for rekindling my passion for physics and understanding the observable universe
@OasisMilo
@OasisMilo 3 жыл бұрын
Congrats man
@muazshash9802
@muazshash9802 3 жыл бұрын
Aye congrats! Just finished my first year of computer engineering. Did you choose to go into hardware or software?
@masternobody1896
@masternobody1896 3 жыл бұрын
i think derek is wrong becasue light reflects back in mars so mars lights speed conventional.
@___________2204
@___________2204 3 жыл бұрын
@@OasisMilo thank you!!!
@___________2204
@___________2204 3 жыл бұрын
@@muazshash9802 thank you!! well my major is supposed to be a combination of both, so i took a lot of electronics courses which i ended up absolutely hating lol. so i'm focusing more on personal development for the software side. wish i could take more CS courses strictly but i gotta finish my requirements. what about you?
@mongke1000
@mongke1000 4 жыл бұрын
Lol when Destin realizes Derek is about to drag him into relativity
@kevinrasmussen1748
@kevinrasmussen1748 4 жыл бұрын
yeah, that was hilarious.
@WyattCayer
@WyattCayer 4 жыл бұрын
That got me good when he realized what was about to come up XD
@andreasmeyer1433
@andreasmeyer1433 4 жыл бұрын
When we look at the stars, we look back in time (at least if c is isotropically constant as usually assumed). The furthest look we can have is to observe the microwave background, isn't it? And as it changes smoothly the speed of light should change continously depending on the direction. Moreover, if we assume c is infinite for a particular direction, we should therefore be able to see indefinetly far into the universe and thus indefinelty much galaxies. So, if we compare the galaxies visible in different regions of the sky, we should be able to estimate an upper limit for deviations from an isotropically constant speed of light?
@marcodebruin5370
@marcodebruin5370 4 жыл бұрын
Came to the comment-section just to point this out as well.
@bartjuh60
@bartjuh60 4 жыл бұрын
This exactly, an interesting video nonetheless but this was not mentioned
@cucumber_999
@cucumber_999 4 жыл бұрын
they had that tired photon theory
@zoltandober
@zoltandober 4 жыл бұрын
Arguably, the distance of those far away galaxies cannot be determined if C is not constant. So basing the value of C on how much more "primitive" a galaxy looks depending on how far away it is only reinforces the unknown presented in the video. If we look at different patches of the sky we see that there is no standard/constant change in the development of those galaxies, and this is generally explained as the result of gravitational lensing. However, the same observation can be explained by the variability of C as well.
@shubchev6525
@shubchev6525 4 жыл бұрын
I was just wondering the same thing. If direction matters, wouldn't we see parts of the sky more or less as what they were some time ago (and therefore having dark gaps in which light hasn't reached us yet) and at the same time other parts that are much much brighter since that direction is the "realtime view" (if we can call it that) and we see much much farther away (and more stuff too)? Anyway, cool video as usual :)
@qtip64
@qtip64 19 күн бұрын
I always love these types of videos, they always show just how little we actually know about the universe we all live in!
@suvratarya
@suvratarya 4 жыл бұрын
"Stars look exactly as they are right this instant." Gave goosebumps.
@Cre8Lounge
@Cre8Lounge 4 жыл бұрын
kzbin.info/www/bejne/pIOqdI2eaqZripY
@ABHEEeeee
@ABHEEeeee 4 жыл бұрын
We saw past of star coz it take millions of year to reach star's light to earth
@calebmcnevin
@calebmcnevin 4 жыл бұрын
@@ABHEEeeee Watch the video
@xx_1dreamstanlegend_xx422
@xx_1dreamstanlegend_xx422 4 жыл бұрын
@@ABHEEeeee how do you know? Are you saying you can prove the return trip isn't instantaneous?
@jontisaurusrex9851
@jontisaurusrex9851 4 жыл бұрын
Have a rocket exactly half way between earth and Mars. The ship will send one message to earth and the other the Mars and then instantly back to earth. You would expect that the message that was sent to Mars first would take exactly three times as long to reach earth as the one sent straight there. If this does happen then the speed of light is the same in both directions.#big🧠
@khizirmohdismail9149
@khizirmohdismail9149 3 жыл бұрын
The moment when Destin realized "Oh snap, Derek is going relativity• is Golden!
@R0TEK
@R0TEK 3 жыл бұрын
Where does the quotation end?
@fritt_wastaken
@fritt_wastaken 4 жыл бұрын
What relativity actually tells us about is that it is meaningless to even talk about "right now" for other observers, time is trully relative. Synchronisation problem only reminds it for those in doubt
@dan7291able
@dan7291able 4 жыл бұрын
Basically, the problem is the invention of language and our definition of "Now" lol, the math works, words dont
@StefKomGeekru
@StefKomGeekru 4 жыл бұрын
but is relativity a constant or relative to itself?
@RFC-3514
@RFC-3514 4 жыл бұрын
This. People would understand relativity much better if they were introduced to concept of locality earlier. There is only one real "now", which is _my_ now.
@YounesLayachi
@YounesLayachi 4 жыл бұрын
@Science Revolution your spam will be reported
@YounesLayachi
@YounesLayachi 4 жыл бұрын
@@dan7291able yes, this 👌 Language is older than maths/logic and physics
@SHARD_OF_GLASS
@SHARD_OF_GLASS 8 күн бұрын
Here's an experiment that I don't know has ever been tried. Set up 3 points on a line A,B, and C have them be equally spaced apart. Using the speed of light from the round trip measurement we synchronize the clocks at B and C from A that way we know that the synchronization signal only traveled in one direction to both clocks. Then measure the speed of light between B and C in each direction separately.
@yodaas7902
@yodaas7902 3 күн бұрын
You wont know long it takes for the light beam to travel from A to B (and equivalently B to C) and therefore cant synchronize them
@hagerty1952
@hagerty1952 4 жыл бұрын
Dude! Your cinematography is killer! The shots of you on top of that hill with the Belt of Venus visible in the sky was positively cinematic!
@strangeman8062
@strangeman8062 3 жыл бұрын
If using not 2 timers, but 3 timers. Possible to get real speed)))
@WishMount
@WishMount 3 жыл бұрын
This was the most elaborate, philosophical, mind-boggling, brain bending, insightful, confusing way of saying: We Can’t.
@FranticEnemy126
@FranticEnemy126 4 жыл бұрын
"So some one has measured speed of light" "Or have they??" *Vsause theme plays*
@alijayameilio
@alijayameilio 4 жыл бұрын
I kinda expect there's a theme song... But left disappointed
@MikeTaffet
@MikeTaffet 4 жыл бұрын
*vibrophone intensifies*
@sharofs.6576
@sharofs.6576 4 жыл бұрын
Is he even alive
@sharofs.6576
@sharofs.6576 4 жыл бұрын
Vsauce must have run out of topics. Loved his channel.
@bestonyoutube
@bestonyoutube 4 жыл бұрын
yes what a garbage clickbait channel this has become....
@musicalengineer
@musicalengineer 13 күн бұрын
Someone said , "There is no time, only clocks and none of them agree". Thanks, I always enjoy this channel!
@murpledeer
@murpledeer 2 жыл бұрын
This is one of the things that I love about physics. As a quote from my teacher “nothing can ever be proved there can always be some thing that is impossible for us to measure. This is what makes physics and all other things related to it able to revision”. There could be thousands of things that are impossible for us to prove because our brains could not possibly comprehend it and our technology, currently, could not feasibly measure it.
@AsadK5.0
@AsadK5.0 2 жыл бұрын
When I learned that under any circumstances, some form of energy will always go to waste. Since high school, I have always done imaginations on how we can build a device where 100% energy can be used. Like creating a light bulb that emits heat but using that that heat to power another device. But then I thought I don't need all the light that the bulb is producing. So yeah my mind always boggles in these imaginations. But it's fun to invent different devices in my Brain nobody will ever know.
@silasbarreto6407
@silasbarreto6407 2 жыл бұрын
There is a logical answer to this dilemna ... Reflected light is still light, therefore it travels at the same speed because it is the same... Thing which is nothing more nothing less it is just "LIGHT" KISS keep it simple stupid.
@deydraniadiancecht8298
@deydraniadiancecht8298 2 жыл бұрын
But isn't the speed of light constant? The entire basis of C is that it is unchanging. If you measure it in one direction, well... you've measured it in all directions. It can't change.... unless all of that is wrong and C does indeed change. If it's not a constant, well, that breaks a lot of equations, doesn't it?
@musaiyabmirzaali
@musaiyabmirzaali 2 жыл бұрын
@@deydraniadiancecht8298 That's the point of the video. That it is the definition, not the fact. And that it breaks none of the current laws of physics as long as the average is 'c'.
@altaltevan2814
@altaltevan2814 2 жыл бұрын
If light is Infinitely fast on the way back wouldn't we see reflections of light from far away galaxies and there would be no observable universe barrier?
@skeleton208
@skeleton208 3 жыл бұрын
“We don’t you reply quicker?” “Sorry babe I’m at Mars rn”
@majidaskari8306
@majidaskari8306 3 жыл бұрын
That's the way to measure the one-way speed of light. Send babe to Mars.
@energyzap9484
@energyzap9484 3 жыл бұрын
@@majidaskari8306 it doesn't matter; no matter if light is same or different in all directions, it will take 20 mins.
@yeahuh4128
@yeahuh4128 4 жыл бұрын
"Or have they?" **strong flashback of Vsauce*
@KingR787
@KingR787 4 жыл бұрын
Why didn't he queue the song?! haha
@WickedMuis
@WickedMuis 4 жыл бұрын
@@KingR787 He'd need a colab and permission to use the song =)
@Retotion
@Retotion 4 жыл бұрын
It's a shame Vsauce doesn't really do these types of videos anymore
@dianereid587
@dianereid587 4 жыл бұрын
Us to aliens: "We measure a meter as the distance a light takes to travel in 1/299 792 458 seconds" Aliens: "Which way monkeys?"
@ishworshrestha3559
@ishworshrestha3559 4 жыл бұрын
Ok
@Hikizuru
@Hikizuru 20 күн бұрын
Use a ultrasonic wave in the middle to activate the 2 clocks. We know sound travels the same speed in both ways. Measure the distance of the 2 clocks based on the speed of sound and use this as the activation time for both clocks. Then shoot the beam of light.
@MrKYO-wi7qg
@MrKYO-wi7qg 8 күн бұрын
I have a kind of similar idea, but don't know where to verify???
@mikaelfredagsvik8606
@mikaelfredagsvik8606 5 күн бұрын
I would guess that either time dilation or length contraction will cause the signals to arrive at slightly different times no matter how precise you are.
@eds1942
@eds1942 3 жыл бұрын
“No Officer. I was not speeding. You see, the speed of light different depending on the direction.” Officer: “lol. Here’s your ticket.”
@epicvillain8308
@epicvillain8308 3 жыл бұрын
Actually this argument has held up in court. Google it, it’s pretty awesome.
@puskywastaken
@puskywastaken 3 жыл бұрын
@@epicvillain8308 I tried to but couldn't find it. Mind sharing?
@lilsabin
@lilsabin 3 жыл бұрын
@@epicvillain8308 you are lying
@orlanino
@orlanino 3 жыл бұрын
@@lilsabin 🤣
@aaronh8943
@aaronh8943 3 жыл бұрын
@@epicvillain8308 No but the dopler effect has, even though it works in the driver's favor. Far as I know this argument does not work anymore because of that factor (I just drive a truck though 😅).
@andyabajo
@andyabajo 4 жыл бұрын
4:07 *Vsauce music starts* and im anticipating a round head will pop from the bottom of the screen.
@TheProGam3rHD
@TheProGam3rHD 4 жыл бұрын
Hey, just to let you know someone else in this comment section named Nihab Khan copied your exact comment word for word soon after you posted. Control + F to find the bastard. Go give him hell lmao.
@ethangutierrez359
@ethangutierrez359 4 жыл бұрын
I’m glad someone else thought this😂
@-MVP-
@-MVP- 4 жыл бұрын
IKR
@princetyagii
@princetyagii 4 жыл бұрын
Or is it,,😂😂
@DudeWhoSaysDeez
@DudeWhoSaysDeez 4 жыл бұрын
yeah my brain stopped working. I long for the days of before I saw this video
@emilianopisani9203
@emilianopisani9203 4 жыл бұрын
"Ok, let's synchronize our watches!" - 2070 Nobel Prize winner
@controlequebrado4455
@controlequebrado4455 4 жыл бұрын
SEND THE REINFORCEMENTS THIS GUY IS LOW ON LIKES
@controlequebrado4455
@controlequebrado4455 4 жыл бұрын
Also there were two nobel prizes awarded for breaking the assumption scientists had about the charge parity and time simmetries so this wouldn't be a first but would probably be one of the best
@tonylastname4752
@tonylastname4752 4 жыл бұрын
You could just move both clocks at the same speed for half a mile then measure the exact time the light was turned on, and then the exact time it reached the destination and do the math
@tonylastname4752
@tonylastname4752 4 жыл бұрын
i meant move them In opposite directions
@mollykins8h
@mollykins8h 4 жыл бұрын
I thought this said witches... Happy Halloween!
@kaykyhardy6205
@kaykyhardy6205 25 күн бұрын
I got a ideas: 2: get a câmera, a lazer, 2 servo,a rod or a beam, and a timer. Set everything on top of a servo to rotate a little bit every Second and the other servo to counter-rotate the earth's day night cycle, place the Rod(or beam) in the servo and the lazer pointing (not in the Y Axis (up and down))) in the center of the contraption and the câmera on the other side pointing to the lazer but a little offset to the side (só the lazer dont hit It). Program the lazer or the câmera to shoot at a time while It rotates. You can place some flags around tô see the derections, but the places where You cant see the lazer You Will know where the light is faster
@spencerwiltse2855
@spencerwiltse2855 4 жыл бұрын
I absolutely love when people can take something ordinary and make us step back and see how much we don't actually know! Even if you can't confirm or prove the knew idea. The greatest discoveries are made when people are willing to challenge the status quo. Thanks for another amazing video
@TheSkystrider
@TheSkystrider 4 жыл бұрын
Measuring the speed of light doesn't seem ordinary to me even if it's the same in all directions.
@32brookse
@32brookse Жыл бұрын
Actually they (in error) took something pretty simple and made it unnecessarily complicated. The solution: Now that we have measured the two way speed of light, we can measure it one way. An observer on Mars can be told that precisely at Noon their local time, that Earth will send a communication. Precisely at that Mars Noon (which Earth also knows on its own clock's time from a previous two-way measurement to synchronize the clocks). Earth sends the communication. Mars then records when the communication arrives and compares the speed indicated to the assumed speed of light (based on the existing two way precedent of nearly 300m M/s). This tells Mars exactly how long it took the light to arrive - and whether it matched the assumed speed of light or took longer or took less time to reach Mars. And if we furthermore allow the communication to reflect back to Earth, Earth can use the same method to record that signal's speed back to Earth and show whether it matches the traditional assumption. To verify this, all Mars needs to do is confirm later for Earth observers at exactly what time the reflection on Mars occurred. This allows us to verify the speeds each way individually and whether light was slower or faster in either direction.
@jam-trousers
@jam-trousers 3 жыл бұрын
This channel is awesome. It digs into fundamental issues in physics - verging on philosophy (ontology and epistemology) - within five minutes of the start of the video you’re right in the trench. But you’ve never been left behind, the issues raised are never inaccessible. Supremely good work.
@Sharmajay69
@Sharmajay69 3 жыл бұрын
So what does they mean when they say it takes 8.2 minute for sun light to reach eart pls can someone explain
@rumlia
@rumlia 3 жыл бұрын
Rich Simpson: A very very good observation.
@jam-trousers
@jam-trousers 3 жыл бұрын
@@Sharmajay69 We know the speed of light in a vacuum to a specific approximation, and we know the average distance from the sun to the earth. So we can say that light leaving the surface of the sun reaches the earth in about 8 minutes. This video is about how our measurement of this speed can never be exact because it’s physically impossible to set up such a measurement. But we can work it out approximately. I did it at school using a 100m electrical cable haha
@jam-trousers
@jam-trousers 3 жыл бұрын
@@rumlia haha thank you fellow youtubonaut
@Sharmajay69
@Sharmajay69 3 жыл бұрын
@@jam-trousers i mean light travel in one direction in vaccum and we know the distance and time to reach the earth. So we can measure speed of light in one direction. But versatium is saying its not possible. Can you pls explain me in simple layman's term. I am novice Thanks in advance brother
@booJay
@booJay 4 жыл бұрын
Found this on ​ @Brian Koberlein's blog: "Then in 2010 Jason Lisle revived the idea of anisotropic light. If light moving toward us travelled at infinite speed, and away from us at half the traditional speed of light, then it would allow the most distant light in the young universe to reach us while still agreeing with relativity. As crazy as that might sound, Lisle is right in claiming that such an effect would be indistinguishable from relativity, and this has made the work popular with young Earth supporters. However agreement with relativity isn’t enough. If light did actually reach us from distant galaxies instantly, we would expect galaxies at all distances (or more formally redshifts) to all look the same age. In fact, what we see is that more distant galaxies are younger than closer ones. If Lisle’s idea was correct, we wouldn’t see the magnification of distant galaxies due to cosmic expansion, nor fluctuations in a cosmic background, nor galaxy clustering in agreement with dark energy, nor a host of other observational results."
@joshandromidas
@joshandromidas 4 жыл бұрын
This is exactly what I was thinking. I'm curious if Derek has an explanation as to why we still observe distant galaxies the same way in every direction if lightspeed would vary based on direction?
@anywallsocket
@anywallsocket 4 жыл бұрын
The notion of instantaneous light speed breaks all of physics, unlike as is reported in this video. SR and maybe even GR would remain the same, but QM would explode instantaneously. You have to realize c is better understood as the rate of causality, not just the upper limit for relative object motion, let alone the ‘speed of light’. Much more likely then, if an asymmetry exists, it is a very subtle one, otherwise you’d run into CPT violations, and also have to extinguish the conservation of linear momentum - which itself predicates all other conservations.
@SlimedogYT
@SlimedogYT 4 жыл бұрын
It's travelling one way to us though isn't it?
@ineonfox4787
@ineonfox4787 4 жыл бұрын
@@joshandromidas The thing is, that if lightspeed fluctuates depending on which direction it travels, we'll still see different age of galaxies, because of the difference in speed, so it'll look the same as if lightspeed is constant.
@joeytje50
@joeytje50 4 жыл бұрын
So wouldn't your comment then prove that there is no direction in which light moves instantaneously? Also, considering the uniformity of the cosmic microwave background, wouldn't that show that the speed of light is indeed isotropic? Any directionality of the speed of light would then show in the CMB, right?
@th_architect
@th_architect Ай бұрын
You can synchronize 3 clocks, put two of them at point A and one at point B; let the first one turn off as the light leaves it to point B, the second one turns off as the light reaches it from A (connected with a light sensor), and the last one turns off as the light reaches it from B (also connected with light sensor)
@bLacKliSt3D911
@bLacKliSt3D911 3 жыл бұрын
Even if we figured out the exact speed of light and KNEW what it was, it doesn’t change the fact that I have to go to work tomorrow
@JopsYT
@JopsYT 3 жыл бұрын
and that's facts
@rsolsjo
@rsolsjo 3 жыл бұрын
the speed of work is always c
@michaeldivens7570
@michaeldivens7570 3 жыл бұрын
@@rsolsjo unless it's Monday. On Monday it is C/2
@shikhakapoor4666
@shikhakapoor4666 3 жыл бұрын
@@michaeldivens7570 bruh in a maths lecture its c/5
@relentlessmadman
@relentlessmadman 3 жыл бұрын
When's the lay off?
@ihmusic9481
@ihmusic9481 3 жыл бұрын
"To measure the one-way speed of light, we have to know it" has a ring of Gödel to it - a self-referential truth that can never be proven within the system. Keeps me up at night...
@mariojt2085
@mariojt2085 3 жыл бұрын
i think self reference contributed to many unsolvable things we have currently. turns out we need to start to look more into ourselves to know everything out there
@jimovr7248
@jimovr7248 4 жыл бұрын
“So someone has measured the speed of light......or HAVE they?” *Vsauce intro starts
@phlosen7854
@phlosen7854 4 жыл бұрын
I heard that music start...
@foxtrotfelix9086
@foxtrotfelix9086 4 жыл бұрын
Im your 69th like
@Pacwerdna
@Pacwerdna 4 жыл бұрын
Agreed - thought this felt like a Vsauce video the whole time.
@elig1976
@elig1976 4 жыл бұрын
It is easy - set 2 sensors that send pulse when light passes thru them to perpendicular single clock, so there is no need for synchronization. Path from each sensor to clock and path direction should be same, so delay betwedn pulses will express exzctly time that took light to travel from first sensor to second - that's it, you will measure one direction light speed. Can make a such measurment in several dirdctions just to verify that result is same
@elig1976
@elig1976 4 жыл бұрын
you don't need to know when exactly they send it - you just need to measure delay between 2 pulses. Since each sensor sends its pulse in same direction for same distance , so time of travel of each pulse to clock will be same and delay measured by clock will express exactly time that took light to travel from sensor to sensor
@averros2718281828
@averros2718281828 10 күн бұрын
E=mc2. E and m are scalar quantities and have no direction. Basically, general relativity won't work if c is anisotropic.
@MrSuperpaco
@MrSuperpaco 8 күн бұрын
Well, c has a defined value, so the formula will allways be correct. The video is about measuring the speed of light in one direction. C is just dividing by 2 the time used by a ray of light going from here to there and returning here. So if from here to there light travels at 2c and from there to here at 1/2 of c, the average is.. c
@miklos.
@miklos. 4 жыл бұрын
"Or have they?" --- Thanks VeritasiumSauce.
@NitePHX
@NitePHX 4 жыл бұрын
Destin was probably having a perfectly fine, normal day and then the phone rings. Now he has a broken brain.
@jontisaurusrex9851
@jontisaurusrex9851 4 жыл бұрын
Have a rocket exactly half way between earth and Mars. The ship will send one message to earth and the other the Mars and then instantly back to earth. You would expect that the message that was sent to Mars first would take exactly three times as long to reach earth as the one sent straight there. If this does happen then the speed of light is the same in both directions.#big🧠
@Anton-cv2ti
@Anton-cv2ti 4 жыл бұрын
@@jontisaurusrex9851 In order to measure that, the clocks on the ship and on earth would have to be perfectly synchronized. How are you going to do that?
@vigilantcosmicpenguin8721
@vigilantcosmicpenguin8721 4 жыл бұрын
And that makes it an even better day.
@crisbercutov7405
@crisbercutov7405 4 жыл бұрын
@@Anton-cv2ti Maybe one way would be to accurately calculate at what time exactly the ship would be in a specific place between mars and earth and when the ship knows it's in the correct spot, just set the time to the predetermined on earth time, then proceed with the experiment suggested above.
@ericherrmann8012
@ericherrmann8012 4 жыл бұрын
Rotate a tube or a some type of gear with slits on opposite sides and have a detector to see if light made it through. At a certain velocity of rotation light won't be able to traverse it. That speed and however large the slit is (the distance it would need to rotate to stop the light from making it through) gives you the time. Use that time and distance between the slits to get the speed of light
@likebot.
@likebot. 3 жыл бұрын
I spent a year putting this episode on hold without realizing how important the concept is. Time to wrestle with this concept now.
@TAREEBITHETERRIBLE
@TAREEBITHETERRIBLE 3 жыл бұрын
I NEED MORE VERTIASIUM IN MY BODY!!
@Ae3lolz
@Ae3lolz 3 жыл бұрын
i was stumpped by this video at first for a long time. thinking there was a dire need to confirm lights single direction speed. but i don't think there's any need to do that, I've realized this video is misleading. there are tons of examples in physics that confirm the speed of light is the same in all directions, DESPITE not being able to measure it as of yet. the most notable being if the speed of light were different from different directions, black holes would represent that, as the event horizon would elongate toward one direction and be flatter in the other. making cone-like, egg-like, or junior mint like (a dimple on one side and a crest on the exact opposite side of the dimple) shape pointing to the fastest direction light can travel, because it would take more energy to suck in light in from that direction. instead we observe the event horizon to be perfectly spherical confirming light travels in all directions and polarizations with the same amount of energy and mass.
@m.j.v.4463
@m.j.v.4463 3 жыл бұрын
@@Ae3lolz but the deformation could be unmeasurable from Earth. The video just shows the most extreme example.
@Ae3lolz
@Ae3lolz 3 жыл бұрын
@@m.j.v.4463 nah its spherical. theres proof and pictures, recent ones
@Max-kn9yi
@Max-kn9yi 2 жыл бұрын
@@Ae3lolz I don't believe that is correct. Link? Misleading? Everything he said is true, you can't measure it , sheesh. What are the tons(misleading?) Other examples out there?
@mayankkumar1837
@mayankkumar1837 Ай бұрын
All these factors suggest that time is the determinant of the speed of light, and it is well-known that time moves in one direction. Consequently, the direction of time is directly proportional to the speed of light. As such, light should travel faster when following the direction of time and slower when moving in the opposite direction or making an angle greater than 0 degree.
@FRed-mt6xk
@FRed-mt6xk 3 жыл бұрын
Me a smol brain: light travels at 1 lightyear per year. edit: turns out, this aint smol brain; this is big brain
@LargestLuke
@LargestLuke 3 жыл бұрын
r/3likecomment
@LargestLuke
@LargestLuke 3 жыл бұрын
Jk you don’t get a subreddit
@ZZZZZZA
@ZZZZZZA 3 жыл бұрын
@@LargestLuke 😀😭
@2Xmega56
@2Xmega56 3 жыл бұрын
in fact that smaller size of brain is the faster neuron work on brain Wich make it more smarter
@2Xmega56
@2Xmega56 3 жыл бұрын
@Waldel Martell even if it small it has 1 Petabyte or 1 million Gigabyte of room
@ethzero
@ethzero 4 жыл бұрын
One thing we can know: Click-bait travels at superluminal speeds.
@AxxLAfriku
@AxxLAfriku 4 жыл бұрын
Why is Donald Trump pretty and I am not? But why does he only have a wife but I have TWO HOT GIRLFRIENDS who I show off in my masterpiece YT videos? Do you know the answer, dear pat
@sohampatil1392
@sohampatil1392 4 жыл бұрын
True
@freds2150
@freds2150 4 жыл бұрын
someone's about to get reported
@paulcoe7511
@paulcoe7511 4 жыл бұрын
To quote or at least paraphrase the late great Douglas Adams: Nothing travels faster than light - except for bad news, spacecraft powered by this technology were rather unpopular when they arrived at their destination.
@vasudevraghav2109
@vasudevraghav2109 4 жыл бұрын
@@freds2150 I did report him. This dude keeps on spamming on a lot of channels, probably hired a program to it.
@Caramelldanson
@Caramelldanson 4 жыл бұрын
Okay, I've got a few reactions to this: 1. I feel like Michelson-Morley should have been brought up at some point. I want to say, "But didn't the Michelson-Morley experiment disprove the existence of a preferential direction for the speed of light?" but I'm guessing either something about the measured directions being orthogonal rather than parallel or something about the fact that both directions were using round-trip light would destroy that notion. 2. How do you explain something like the CMB if the difference in the one-way speed of light is as extreme as c/2 and instantaneous? Wouldn't that mean that one end of the Universe was extremely hot and dense 26 billion years ago and the other end is identically hot and dense right now? How does that make sense? 3. Could we measure the one-way speed of light if we could make use of some egregiously curved spacetime? Like, measuring light orbiting in the photon shphere of a black hole, or if we could manage to create the 3D equivalent of a torus (I suspect that might require exotic matter, though)?
@matthiaskuhr8417
@matthiaskuhr8417 4 жыл бұрын
I asked myself the same thing. Similar to your question 3: Imagine a supernova in a galaxy far away. Now imagine a black hole between us and the supernova. We will observe the light twice: Once on the left and once on the right side since the light will be bent by the black hole due to gravitational lensing. Now if light was traveling faster in one direction of space, shouldn't we see a delay between the light on the left and the right side?
@sensorer
@sensorer 4 жыл бұрын
Regarding the second point This is something that bothered me as well. I'm pretty sure that can be ruled out if we remember that The Observable Universe is bound to speed of light and where the speed of light is infinite the whole infinite universe would equal The Observable Universe. And that's why it looks that hot and dense? Does that make sense??
@InsaneSocks1
@InsaneSocks1 4 жыл бұрын
@@matthiaskuhr8417 yes, you would see it twice with a delay. We are currently observing a star the went supernova on the other side of a black hole and so far 4 images of it have appeared and they were able to predict the week the next one would show up.
@NightSkyJeff
@NightSkyJeff 4 жыл бұрын
@@matthiaskuhr8417 draw the diagram. The light bends one way and then bends back to reach you; on the opposite side of the black hole, it bends in the second direction first, and then back in the first direction. You’re measuring the two way speed again.
@descentplayer
@descentplayer 4 жыл бұрын
Thank you. I was asking 1 and 3 myself.
@yongfulu8984
@yongfulu8984 16 күн бұрын
If you think speed of light is different for two directions, it’s your job to prove it. Not just telling people to prove the speed of light is the same. You raise a hypothesis, you prove it. So what if I say there is a ghost standing right next to you, and tell you to prove me I’m wrong otherwise the ghost is true ?
@straaths
@straaths 3 күн бұрын
So you propose the speed is the same both directions? it's on you to prove it now 🤷‍♂️
@4L_Of_Sunflower_Oil
@4L_Of_Sunflower_Oil Күн бұрын
No that was albert einstein my guy, who tf are you?
@jojosimsic2458
@jojosimsic2458 3 жыл бұрын
Notice how he says the debate has been going on since 1905 and the video is 19:05 long...
@anantapadmanabhmyatagiri
@anantapadmanabhmyatagiri 3 жыл бұрын
Coincidence? No!
@Aecor
@Aecor 3 жыл бұрын
Coincidence?? Yeah coincidence
@davidbanan.
@davidbanan. 3 жыл бұрын
100% not intended, it takes people with no time to think like this
@musan9079
@musan9079 3 жыл бұрын
19:04
@PaulAmerican
@PaulAmerican 3 жыл бұрын
I stopped watching it after 13min, coincidence?
@theflyingmylle
@theflyingmylle 4 жыл бұрын
This video really changed the way I look at “simultaneously”
@vast5853
@vast5853 4 жыл бұрын
haven’t seen the video yet, but based off psychedelic experience i know exactly what you mean
@Cameron-nf3nq
@Cameron-nf3nq 4 жыл бұрын
@@vast5853 could you explain ?
@Psionyc
@Psionyc 4 жыл бұрын
Simultaneity*
@faizfrez2729
@faizfrez2729 4 жыл бұрын
Now when i do simultaneous equations, i do the calculation for one, and i instantly get the other one.
@chriskennedy2846
@chriskennedy2846 4 жыл бұрын
This is an awesome, very thought inducing video. A follow up video on what could be causing this potential asymmetry would be fascinating as well. However the centered clock synchronizer at 9:50 doesn't exactly equate to the GPS example he introduces next because in the first example, the A/B clocks agree (correctly) that they are stationary relative to the other. In GPS, the clocks are in relative motion. This creates a larger problem when trying to keep the satellite clocks running at the same "rate" as the ground clocks. They in fact have to run at the same ongoing rate for the system to function accurately but this (like it or not) is in contradiction with special relativity. I cover this in my twin paradox video.
@twicevoodoo3761
@twicevoodoo3761 3 жыл бұрын
this video made me feel insanely smart for 19 minutes and 5 seconds.
@dipeshchadgal9514
@dipeshchadgal9514 3 жыл бұрын
True 😂
@the_enderall883
@the_enderall883 3 жыл бұрын
Um this made me feel insanely stupid for 19 minutes and 5 seconds...😂
@the_observinganalyst4085
@the_observinganalyst4085 3 жыл бұрын
Dunning-Kruger Effect?🤔😁
@РусланСтрашко-щ5п
@РусланСтрашко-щ5п 3 жыл бұрын
Imagine watching it high
@irshadhusen8970
@irshadhusen8970 3 жыл бұрын
same man wtf*
@trainfanattic
@trainfanattic 2 күн бұрын
So here is an idea. Two mountaintops. On one you make a light blink. On the second one, where you are, you place another light and you synchronize the blinking. So now, they are blinking exactly the same. Now take a hike to the other mountaintop. The lights won't blink exactly the same. Measure the time difference, measure the distance. Calculate the speed. Do this in a few different directions and compare the outcomes. Voila. Happy to help.
@quickestturtle2951
@quickestturtle2951 4 жыл бұрын
So someone has measured the speed of light. Or have they? **Vsauce Music intensifies*
@MatthewHughes811
@MatthewHughes811 4 жыл бұрын
What is light? This feather is light. Feathers are used by birds to fly. *Flips you the bird* But what about this bird? Why is this called "the bird"?
@themafsguy999
@themafsguy999 4 жыл бұрын
@@MatthewHughes811 accurate
@Alm_Engineering
@Alm_Engineering 4 жыл бұрын
Hey guys Micheal here
@divyakant3534
@divyakant3534 4 жыл бұрын
Thief
@AzaliahE
@AzaliahE 4 жыл бұрын
@@MatthewHughes811 lol this is gold hahaha
@wShadow1
@wShadow1 3 жыл бұрын
The worst part about me watching this video, is that I understand everything he says, but at the same time, I understand nothing.
@abrahamsanchez7455
@abrahamsanchez7455 3 жыл бұрын
Dude is too smart
@wShadow1
@wShadow1 3 жыл бұрын
@@abrahamsanchez7455 indeed
@nemeryel6482
@nemeryel6482 3 жыл бұрын
Understand the words, but not the meaning, it's what happens
@seanpeters7284
@seanpeters7284 3 жыл бұрын
He does speak English pretty well
@dharmeshvala9886
@dharmeshvala9886 3 жыл бұрын
Same here...
@clarkpatterson753
@clarkpatterson753 3 жыл бұрын
This certainly has interesting legal implications for speeding tickets based on laser detectors (previously mistakenly referred to as "radar guns".)
@GamerGrant100
@GamerGrant100 3 жыл бұрын
I'll try to explain this to the cop the next time I get pulled over. I might get a ride down to the station instead of a ticket.
@mal3xia
@mal3xia 3 жыл бұрын
Apparently it doesn't. Lol
@clarkpatterson753
@clarkpatterson753 3 жыл бұрын
@@Future__martian Fair point. I made a poor choice of words. I was referring to laser-based detectors. In addition to radar, police commonly use laser guns as well. These are completely different than radar guns. They function differently from the police officer’s standpoint, they have a number of advantages and limitations compared to radar, and they require completely different tools to combat as a driver. Thank you for point that out.
@MaxStagsted
@MaxStagsted 3 жыл бұрын
@@Future__martian soooo, you are saying radar waves are as slow moving as sound?
@Sp4rKzTV
@Sp4rKzTV 3 жыл бұрын
There's 2 types of devices used by police to determine a car's speed. Radar measures the doppler shift in the signal and uses the shift to determine the speed of the vehicule. Laser ones, fire a laser at your car and it bounces back and then it does it again and measures the difference between both interval. So it's measuring the 2 way speed (going to and coming back) and not single way. So even if light was slower in one direction it wouldn't change the final result.
@Vo_Siri
@Vo_Siri Күн бұрын
Here’s a way to, if not disprove it, make it demonstrably less likely: Interstellar astronomy. It’s a one-way trip for the photons in all directions towards Earth. If c was meaningfully different in different directions, we would expect to see a very distinct difference in what we see from each side of the sidereal universe. One side would appear substantially younger to us than the other, in terms of types of stars and galaxies we’d see. One side would also be substantially denser with visible objects, because the Observable Universe would be longer in that direction. Which to my understanding is not what we see at all. That only rules out a really significant difference, but it’s a start.
@darwinbodero7872
@darwinbodero7872 4 жыл бұрын
4:18 “then that sounds like a veritasium video”. Love that destin didn’t entertain this sophistry lmao.
@adlerdoesstuff1872
@adlerdoesstuff1872 3 жыл бұрын
"so someone has measured the speed of light... or have they" Vsauce right there caught in 4k stealing Derek's skin
@bruh-uq2zx
@bruh-uq2zx 3 жыл бұрын
*Vsauce was an imposter* 0 imposter remains
@oliviersavard8676
@oliviersavard8676 3 жыл бұрын
*vsauce music starts*
@alessandrogrillo1126
@alessandrogrillo1126 4 жыл бұрын
4:06 "... or have they?" VSAUCE enters the chat
@dantefaulk4229
@dantefaulk4229 4 жыл бұрын
*Vsauce music starts*
@HayBale-u2h
@HayBale-u2h 28 күн бұрын
I’d love to hear thoughts on my hypothetical here: If you were to take a circular object of a known circumference, then wind a specific length of fibre optic cable around this object, send a pulse of light at the same time as beginning a clock, with the clock being at the same location on the object as the laser pulsing the light. Using this, you would be able to average the speed of light based on the direction the circular object is parallel to. If you were to then rotate the circular object about the Z-axis to an angle that is different than the absolute value of the starting angle, then measure again, you would be able to conclude whether or not the speed of light is the same in a given direction.
@canaldoxerxes
@canaldoxerxes 4 жыл бұрын
Mark the Astronaut sends a message. Me, on mission control: "Oh hi, Mark..."
@4.0.4
@4.0.4 4 жыл бұрын
You're tearing me apart, expansion of the universe!
@canaldoxerxes
@canaldoxerxes 4 жыл бұрын
"So, how's your research life?"
@darioinfini
@darioinfini 4 жыл бұрын
ha ha ha what a story Mark.
@LordWaldema
@LordWaldema 4 жыл бұрын
"someone has measured the speed of light.... ...or have they?" Don't you VSauce us like that
@ADRGC
@ADRGC 4 жыл бұрын
Hahaha exactly! I expected Michael to pop up out of nowhere
@patrickpredella
@patrickpredella 4 жыл бұрын
@Florentin sound happens because of pressure waves, which happen because of the fluid (air?) Moving, which is made of various particles, that interact with each other by means of electrical forces. And those are linked to electrical fields, which propagate.. at the speed of light... 🙈 Therefore I guess it's checkmate again
@tthozan7632
@tthozan7632 4 жыл бұрын
Brow if they send massage to Mars at 12:00 and send another massage to Mars after 20 earth minutes. So the man in the Mars kan take the first massage at 12:10 and he can take time and he can se how long it will take to get the other massage so he can find the light speed. It is to easy. Believe me
@culwin
@culwin 4 жыл бұрын
@@tthozan7632 Stop spamming this.
@nayR5
@nayR5 4 жыл бұрын
Veritasium basically is VSauce nowadays
@tylerm.9408
@tylerm.9408 3 жыл бұрын
That was actually one of the best things I’ve ever seen on KZbin. Excellent work!
@kevoramma
@kevoramma 3 жыл бұрын
I see no reason to use the word “actually” here.
@tylerm.9408
@tylerm.9408 3 жыл бұрын
@@kevoramma great point! Thank you for using KZbin comments to help correct my grammar to be more in line with your taste. Tell you what, give me your email address and I’ll send over some other comments I want to write and you can give me some more feedback before I post them 👍🏻
@SquidKiller-oi3bb
@SquidKiller-oi3bb 3 жыл бұрын
@@tylerm.9408this is one of the best comments I've seen
@kevoramma
@kevoramma 3 жыл бұрын
@@tylerm.9408 lol
@tylerm.9408
@tylerm.9408 3 жыл бұрын
@@SquidKiller-oi3bb but is it ACTUALLY one of the best comments you’ve ever seen?? 😂😂😂
@danharig3596
@danharig3596 Ай бұрын
Without reading all of the comments. My suggestion is to use 2 lasers and time each direction. separately.Not being a Smarter Every Day or a Veritasium, I am however an Every Day a Verispasium. Obviously this has already been thought of. The 2 of you play off one another very well, it's a pleasure watching both of you.
@LightDarkxZ
@LightDarkxZ Ай бұрын
We can't time any direction independently. We can only time two directions at once.
@teja8575
@teja8575 4 жыл бұрын
"so someone has measured the speed of light? or have they " sounds like vsauce
@joseville
@joseville 4 жыл бұрын
Veritasium, Derek here...
@Hermann493
@Hermann493 4 жыл бұрын
*Vsauce music starts playing..*
@ricobrawlstars4880
@ricobrawlstars4880 4 жыл бұрын
**Camera zooms to michael**
@debo325
@debo325 4 жыл бұрын
Rip vsauce
@mcknorth
@mcknorth 4 жыл бұрын
@@debo325 is michael dead????
@bob_kazamakis
@bob_kazamakis 4 жыл бұрын
Old Derek: makes people on the street feel stupid Present Derek: make rocket scientists feel stupid
@thenawabkhanaal9263
@thenawabkhanaal9263 4 жыл бұрын
True
@terryfuldsgaming7995
@terryfuldsgaming7995 4 жыл бұрын
only by asking a dumb philosophical question that reality refutes on every level... This is why philosophy is garbage. Possabilities dont matter, reasonable probabilities do.
@mikemclaughlin1268
@mikemclaughlin1268 4 жыл бұрын
@@terryfuldsgaming7995 bro my mans said Einstein himself did the two way measurements and he has many points in this video based on relativity not philosophy
@davyboyo
@davyboyo 4 жыл бұрын
Past derek and present derek is meaningless according to this video
@onemadscientist7305
@onemadscientist7305 4 жыл бұрын
@@terryfuldsgaming7995 Reasonable? Take a good, hard look at our current understanding of physics and come back when you're ready to call it reasonable. The very reason philosophy _is_ interesting is precisely because there are possibilities about reality that sound completely bonkers to us, and yet there's strictly nothing explicitely fordidding those possibilities... so what rational reason could you possibly have to dismiss them entirely? Symmetry? That sounds like a good argument, but there are plenty of situations in the real world where symmetries are broken. You could say that, on a purely a priori basis, more symmetrical options are more likely, but because it's a continuum between being completely symmetrical and being completely asymmetrical, without changing anything about causality, physics or your everyday experience (since if there was a difference you could measure it), the probability that the situation is _perfectly_ symmetrical would be zero. Even as a thought experiment, this entire thing is fascinating because it completely breaks our intuitions.
@nekoill
@nekoill Жыл бұрын
Don't you just love it how Destin was spelling out how they measured that ball's speed and immediately realized what you were up to? 😸 Can't help but love that guy
@arthuraguiar5382
@arthuraguiar5382 Жыл бұрын
"... and then your clock...... goddamn..."
@renatorcyrne
@renatorcyrne 2 ай бұрын
How about trying a game of mirrors? Place the clock and the mirror at distance X and measure. Then, add another mirror, where the first reflects to the second and then to the clock, keeping the same initial distance X between them. In the end, you can subtract 2 paths from the first test from the 3 paths of the second test. Leaving only one part remaining.
@RimuKora
@RimuKora 3 жыл бұрын
4:04 "So someone have measured time... or have they?" You're making me feel like you're actually Vsauce's cousin
@37rainman
@37rainman 3 жыл бұрын
Anything to churn out another vid, my friend, just anything......
@michaelhoste_
@michaelhoste_ 3 жыл бұрын
..or is he?
@zerokmatrix
@zerokmatrix 3 жыл бұрын
Hey Veritasium, Derek here
@michaelhoste_
@michaelhoste_ 3 жыл бұрын
@Alexis Degryse If the light from the nuke has reached us then it already happened an hour ago. (Not sure what you mean by an ‘hour behind’)
@kelvinnueveanimeguitar1983
@kelvinnueveanimeguitar1983 3 жыл бұрын
My head is hurting but I'm enjoying this video not gonna lie. Things that's just unknowable is really interesting to think about.
@pixelbogpixxelbog2090
@pixelbogpixxelbog2090 3 жыл бұрын
But he answered the question himself... around 13min he explains how it is possible to measure if the speed of light goes faster one way than the other...
@pixelbogpixxelbog2090
@pixelbogpixxelbog2090 3 жыл бұрын
Correction: another way to measure it in around minute 15
@kelvinnueveanimeguitar1983
@kelvinnueveanimeguitar1983 3 жыл бұрын
14:01 actually explains why it's unknowable since all the possibilities can actually be possible. Light could move at the same speed in all directions and light could move a certain speed in one direction and almost instant coming back. There's no way to prove which is correct hence it's called a convention. Meaning everyone just agrees that light moves in a certain speed equally in all directions to make things easier.
@chriskennedy2846
@chriskennedy2846 3 жыл бұрын
@@kelvinnueveanimeguitar1983 To be honest it almost broke my brain too but I'm happy to say I finally solved the light measurement puzzle and posted a video on it.
@bernardlowrey473
@bernardlowrey473 3 жыл бұрын
Doesn't he solve the problem with the mars example? When we travel to mars that experiment can be done. The clocks and be reunited on earth and if they are the same we know the speed is same in both directions, right ??
@bigjoes.1545
@bigjoes.1545 3 жыл бұрын
Thanks you’ve distracted me from my engineering finals by making me question a convention of physics.
@Twisted_Code
@Twisted_Code Ай бұрын
And this is why spooky action at a distance shouldn't be so surprising
@shobhitsundriyal4822
@shobhitsundriyal4822 4 жыл бұрын
Perfect Idea for Christopher Nolan for his next movie.
@Harley411
@Harley411 4 жыл бұрын
Boy that guy make any scientific concepts into blockbusters,
@tylertorsiello8450
@tylertorsiello8450 4 жыл бұрын
yessirrrr
@GanjaLibre
@GanjaLibre 4 жыл бұрын
@Meggion Well, yes... Thorne was credited as the scientific consultant for the movie. Of course Nolan didn't invent the scientific concepts for Interstellar. What's the point of your comment?
@amehak1922
@amehak1922 4 жыл бұрын
Yes!!
@ognyangerasimov6410
@ognyangerasimov6410 3 жыл бұрын
This video contains errors, I think Nolan has good physics advisors.
@lustechsource5197
@lustechsource5197 4 жыл бұрын
"This is breaking my brain." Exactly how I felt.
@ameliamelton6566
@ameliamelton6566 4 жыл бұрын
@Tyler B #2 bait lmfao
@lustechsource5197
@lustechsource5197 4 жыл бұрын
@@ameliamelton6566 Ha ha! Exactly!!!!
@smokeythemouse289
@smokeythemouse289 4 жыл бұрын
This guy, tony stark lookin, type, Bruce banner
@0229126
@0229126 4 жыл бұрын
How about using quantum computer entanglement to sync the two clocks and measure the light in a single direction?
@ascherlafayette8572
@ascherlafayette8572 4 жыл бұрын
Indeed
@divyakant3534
@divyakant3534 4 жыл бұрын
"Or have they?" Hey VSauce! Michael Here
@MO-fg2cm
@MO-fg2cm 4 жыл бұрын
Tohba tohba tohba mood kharab kar diya
@MO-fg2cm
@MO-fg2cm 4 жыл бұрын
Abbe saale
@divyakant3534
@divyakant3534 4 жыл бұрын
🤣🤣🤣
@NimbleBard48
@NimbleBard48 4 жыл бұрын
That would be such a collab! Derek already did one with Michael but not with Destin in one video.
@divyakant3534
@divyakant3534 4 жыл бұрын
@@NimbleBard48 We all want that to happen💥💥💥
@TheNecco1
@TheNecco1 Ай бұрын
Use camera A for a live video call from camera 2 to view clock 2. Record the moment light leaves at point A from camera 2’s clock and when it reaches clock 2 in the live video feed from camera 2. If you are only observing clock 2 from a live video feed and recording the time when the light reaches it, you would be eliminating the need for precise clock synchronization between clock 1 and clock 2.
@Cosmos-uq5gr
@Cosmos-uq5gr 3 жыл бұрын
“Why has no one measured the speed of light yet?” the thumbnail: *”it’s impossible”* welp my time here is done
@maybedizzy
@maybedizzy 3 жыл бұрын
Fr
@Controller_Dog
@Controller_Dog 3 жыл бұрын
Welp carry on
@av8077
@av8077 3 жыл бұрын
like whats even the point of watching
@Ins1gn1f1c4nt
@Ins1gn1f1c4nt 3 жыл бұрын
@@av8077 To understand why ig I mean, if I as panicking on a way to save my loved one and the doctors outright told me it's impossible, that would not bring me any closure or explanation to the reason. So in the same way we ask why and we get the answer being impossibility, we aren't brought closure and explanation on a major physics study. Now wooosh me :)
@mzreina74
@mzreina74 3 жыл бұрын
@@Ins1gn1f1c4nt not r/Woooosh
@danpeer5908
@danpeer5908 4 жыл бұрын
17:01 "And we'll wonder, why we didn't c it before?" Amazing!
@chriskennedy2846
@chriskennedy2846 4 жыл бұрын
g, I'm not sure...
@dessertthingy
@dessertthingy 3 жыл бұрын
This tickled my brain in all the right ways.
@daviddesousa3178
@daviddesousa3178 3 жыл бұрын
Tickle tickle.
@weare7043
@weare7043 3 жыл бұрын
In all the light ways
@vermontmoto7155
@vermontmoto7155 3 жыл бұрын
That’s what she said -micheal Scott
@MakaryPropson
@MakaryPropson Ай бұрын
Everything travels at the speed of light through spacetime so there is always that discrepancy, but it can NEVER change the result of an experiment. It also might not even make sense to ask the question in other words it may be a "confused question". I for one believe that it is a "confused question", but that still may be "just a convention".
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