Would Headlights Work at Light Speed?

If you were driving at the speed of light and turned on your headlights, what would happen?
Twitter: / tweetsauce
Instagram: / electricpants
Sources and extras below!!
Thanks to Jude for asking me this question on twitter! / 550865272895447041
“The Life of the Cosmos” by Lee Smolin: www.amazon.co.uk/The-Life-Cosm...
“In Search of the Multiverse” by John Gribbin: www.amazon.co.uk/In-Search-Mul...
“The Pig That Wants to be Eaten: by Julian Baggini: www.amazon.co.uk/The-Pig-That-...
Relevant MinutePhysics videos:
• Common Physics Misconc...
• E=mc² is Incomplete
light slowing down in glass: • The Speed of Light in ...
a different perspective from Sixty Symbols about light slowing down: • Why is light slower in...
Why is “c” the speed of light?
math.ucr.edu/home/baez/physics...
Car at light speed:
www.sydneyobservatory.com.au/2...
van.physics.illinois.edu/qa/l...
www.scienceforums.net/topic/82...
www.desy.de/user/projects/Phys...
Light speed is the same in all inertial frames of reference:
www.physlink.com/Education/Ask...
van.physics.illinois.edu/qa/l...
hyperphysics.phy-astr.gsu.edu/...
Relativistic addition of velocities:
demonstrations.wolfram.com/Ein...
cnx.org/contents/e3a41220-af3f...
doppler shift:
commons.wikimedia.org/wiki/Fil...
Relativity:
www.refsmmat.com/jsphys/relati...
www.astro.virginia.edu/~jh8h/F...
Light speed and catching-up to light.
www.pitt.edu/~jdnorton/Goodies...
math.ucr.edu/home/baez/physics...
www.askamathematician.com/2010...
scienceline.ucsb.edu/getkey.ph...
van.physics.illinois.edu/qa/l...
Other good relativity resources: newt.phys.unsw.edu.au/einstein...
Light echo footage: www.spacetelescope.org/videos/...
“fine-tuned” universe:
io9.com/5989467/how-does-the-a...
en.wikipedia.org/wiki/Fine-tun...
rationalwiki.org/wiki/Anthropi...
Irrational numbers: mathworld.wolfram.com/Irration...
a million digits of pi: www.piday.org/million/
THERE'S MORE VSAUCE!!
Vsauce2: / vsauce2
Vsauce3: / vsauce3
animated drawings by Guy Larsen / guylar
rocketship animation by Eric Langay / ericlanglay

[@prabhdeepsingh5642]

It's interesting to see that even after so many years none of the Vsauce videos seems old. They are ageless.

[@olivercharles2930]

Exactly! They never feel like they came out 10-8 years ago, even if they actually did.

[@wren_.]

like the speed of light

[@mosubekore78]

Should make youtube contents like this, ageless

[@crosstian]

Just like photons 😉

[@jonde3]

I would say because they travel at the speed of light but well they reached my recommends feed after 7 years, so..

[@prebenkjernsby6312]

Driving fast makes you live longer kids

[@prebenkjernsby6312]

Tabinda Jabeen just watch out for space bumps

[@doctor_yoyo4102]

4.5 years and this is by far the best comment xD

[@liamalon7599]

​@Tabinda Jabeen or you can just go at 49.655 km per second and the color red will appear green on a traffic light

[@notsure6187]

Turtlemurderer Dude watch out for space trees and space telephone poles.

[@sidhantvaishnavi19]

You wont live longer according to you. You'll experience the same amount, so it won't matter.

[@GanerRL]

9:16 imagine if he said one sun instead of two

[@henil0604]

That scares me :|

[@kathrynmercier4874]

I was just thinking that, it would have been a clever joke lmao

[@edwardclark6731]

IF he said 10

[@edwardclark6731]

(@me) binary joke

[@yoriboi2228]

Maybe it was meant as a joke in another universe but in this one it just seems like he tells the truth

[@aes0p895]

Just dropped in for a quick existential crisis. Thanks Michael, you always deliver!

[@naryosh_]

Whoa whoa whoa, my fridge NOTICES me moving? Oh man I hope it doesn't think I'm fat.

[@RyanBarnes]

No, I'm sure it doesn't. It probably lives in constant fear every time you go near it. This is because every time you open it you rip it's insides out, cook them in front of it and then eat it. Granted, you put more in, but the process never stops until it just can't take it anymore.

[@naryosh_]

Ryan Barnes Until it just can't take it anymore... Then what happens?

[@RyanBarnes]

+100 jokes about if you're refrigerator is running, and if so we better catch it

[@naryosh_]

Ryan Barnes And since it has all of my food, drinks, and nutrients inside of it, it can run for a very long time.

[@RyanBarnes]

+100 I hope when it decides to go, you don't have any dunkin drinks in it.

[@blazerona1329]

How to make a vsauce video: 1. Start with a question that sounds interesting 2. Insert math 3. Put your viewers through an existential crisis 4. Profit

[@superalvin7208]

Yes

[@uselessshoe9269]

Blazerona 1.5: educate the viewer on a lot of topics

[@Rhovanion85]

0. Hey , here !

[@largeoctahedron]

Blazerona how to make a vsauce video: 1: mindfuck 2: profit

[@Booksds]

Step 3.b) Jake Chudnow.

[@robokaos69]

Vsauce videos are as timeless as the experience of a photon

[@ojasthakur3976]

Underrated comment

[@pizzainc.1465]

No it’s a copy of another comment

[@robokaos69]

@@pizzainc.1465 fuck you i came up with this shit all on my own

[@jordanmicahcook]

Michael: “While walking to your refrigerator for a snack, you will measure your fridge to be a one hundred quadrillionth of a meter nearer, and thinner, than you would while at rest with it.” Me: “Oh good! Glad I’m not the only one who noticed…”

[@as7river]

Can confirm. Though my measurements vary by a sextillionth of a meter depending on the time of the day.

[@saubererzauberer1230]

9:15 - 9:25 Imagine if he said 1 sun instead of 2 just to mess with our heads

[@Hydroliized]

i was literally thinking the exact same thing that couldve been great lol

[@on333]

what do you mean? the earth has 3 suns.

[@georgesracingcar7701]

It has two moons, too! Like Mars!

[@havendewart]

What if he said one Sun instead of two to mess with the people with two suns?

[@dawnofarts5151]

Wait am confused, we do have two suns

[@michaelkeating9514]

turning on headlights at light speed? ain't nobody got time for that

[@sukritchandra2695]

lolwut?

[@The1Critic2]

I see what you did there. Or do I? dang

[@sukritchandra2695]

i did

[@EvolBob1]

+Michael Lolwut What Vsause didn't say was as you or any object approaches light speed, the mass increases. So even a single proton could gain the mass of a galaxy if traveling close enough to the speed of light. Same goes for a spaceship, go fast enough and your mass will increase so high your spacecraft would collapse as a Black Hole. And it is at that point you can turn on the headlights - but no one will have time for that :)

[@marcozwinkels2562]

+Evol Bob so thats why we cant reach anywhere near lightspeed besides the factors of money and resources. Now i only need to know the point at which a ship that could achive near light speed becomes a black hole or become quite unstable because its mass would attract objects to it self.

[@masterofrussianbias8024]

He should have said, "theres a universe of you watching this video but the earth only has 1 sun" would have been a mind fuck for a second

[@shady8045]

4:02 I love you making it this scale implies that the ships are extremely massive. Like literally bigger than earth I’m pretty sure and by a lot too

[@tommax1626]

Yes earth is about 15'000 KM thick if i remember correctly, while these ships are roughly 299'792 KM long 😂

[@hardman666]

would headlights work at light speed? conclusion: you are not real.

[@m1cha3lsm1th2]

Ri Nima lmao

[@WackyOctopus]

That pretty much sums up the direction that most vsauce videos end up going.

[@Dubs2]

Ha ha. I think you won the internet

[@TheDeepState2001]

Conclusion we are real due to irrational numbers idiot

[@justsomeduck2242]

They could make procedural generators

[@asani9835]

2:50 when you ask your German mom if you can go hang out with your friends

[@freddie2012]

😂😂😂

[@zoviostandoff2688]

I love it

[@Benjamin-zf7eu]

Hahahahahah😂

[@subhajitdutta2989]

2:50 when you ask your Bengali friend for some money

[@gush35z67]

Asani Wasabi haha

[@substandard-apartment-complex]

I wonder if you could beat a photon in a race if you were going, like, infinitesimally close to the speed of light, and the photon was passing through some material that causes it to take a much longer path than you.

[@i_whiteshadoww]

Yes you can.

[@themilkman6969]

well that just isnt fair imagine usain bolt not winning the gold at the olympics because someone tied bricks to his feet

[@user-pk9qo1gd6r]

Of course. There are devices that slow down photons to slower than hjghway speeds.

[@sierra1513]

Nuclear reactors called, they want their cherenkov radiation back

[@maheshkhokhar8652]

Just keep some water in the path of your opponent 😉 Seriously though you wouldn't even realise that you had travelled

[@HardRockMiner]

The speed of light is a constant. When you think about that, it's 1 of the most mind blowing things out here.

[@ameennasar2583]

It's one of the things that can humble us mortals, who have achieved previously unimaginable feats. But lightspeed remains the same

[@innerbytes]

The speed of light is unknown. It might not be even constant. There is a good video about it: kzbin.info/www/bejne/poXRZ3itncdlbc0

[@aarondavis8943]

It worked out well for Einstein.

[@jerk_store]

@@innerbytes You're talking an establishment who have a habit ignoring the term _theory_ and regurgitating said theory as law. If I were a betting man, I'd bet on the speed of light being different, depending on the variables, such as the vacuum of space.

[@charliewright2667]

​@Jerk Store I don't think you understand science, have ever taken a university level science course, or even work in a science adjacent field if you don't understand how the word theory is used. It's the 'theory of evolution'. It also 100% definitely happened, but we can't say it's absolutely true until we disprove literally every potential piece of evidence against it. Laws are for mathematics lol

[@ryseofthegamers9729]

What I love about vsauce is that Michael can say something like “you can’t turn on the headlight, because you would feel like before you were conceived” , and make perfect sense in the context.

[@jeffsanti]

For those wondering, is at 7:57

[@deleted-something]

Ye

[@ahsangamer2745]

@@jeffsanti Yes we already know very well

[@PassTheSnails]

“When walking to your fridge for a snack, you will measure your fridge to be a quadrillionth of a second nearer and thinner than you would while at rest with it.” Like cmon how the hell are you gonna have that make any sense, but he does it anyways

[@regittark9031]

Thumbs up if your Earth DOES have two suns.

[@swagermuffinz8050]

those dual sun earth dwellers have a dual sun KZbin, which we don't

[@curtismcdonald1942]

Is it even possible to have two Suns? Can we orbit two separate things at once? Would one sun be a moon?

[@wj11jam78]

Its funny because if there's a universe with two suns, then there's a universe with two suns advanced enough to watch the internet of other universes. Like Rick and Morty!

[@EnricoPiazza]

curtis mcdonald Yes. www.quora.com/Can-one-planet-have-two-suns And no, none of the two suns would be a moon. A moon have to orbit the planet to be defined as moon. [Unless one of the two suns (or both...) orbits the planet... but it doesn't seem possible: www.quora.com/Can-a-star-orbit-a-very-big-planet ]

[@MetsuryuVids]

I can see thousands of suns from my earth. It just happens that it only orbits one.

[@paradox6647]

Tbh, this is one of my favourite vsauce videos of all time, it contains so much information and ideas that literally bend my brain.

[@rdtyphon6684]

9:20 haha sick joke vsauce, imagine a universe with one sun 🙄🛫🏢🏢

[@HappyBeezerStudios]

So moving towards the fridge makes it faster to get there.

[@AgentBLP]

nice :D

[@nadzianyx]

It also makes the fridge and everything in it smaller. I call it the Special Relativity Diet.

[@AgentBLP]

Nadzia Skalapendra ^^

[@StonedDK]

makes sense, sitting still doesn't make it faster. lol

[@ayushdeshmukh284]

It makes it slower to get there, but the distance is still decreased. It's just the the effect of change of time will slow you more than the distance will make you faster. Moving away will increase the distance between you and the fridge (This sounds obvious but you know what I mean), while the time you experience will still slow you down.

[@asdddddaaaaaaaaa]

You should have said "Earth has one sun" at 9:14 so that everybody got mind fucked :D

[@rewrose2838]

+Дмитрий Корьяс ikr!

[@StarLink149]

+Дмитрий Корьяс I thought the exact same thing. XD

[@risvangonzales]

I already lost my focus on whatever he's saying from like 3 minute mark. he already fucked my mind real good

[@drizzlingrose]

+Дмитрий Корьяс but Earth only has one sun? i iz confused

[@drizzlingrose]

Jick the Dog *fry not sure meme*

[@artemisgray9463]

Despite all my research and effort spent trying to understand the world/universe, light speed is the one thing that never fails to tie my brain in a knot.

[@xandror]

It's poorly explained because it was so poorly understood. Light travels infinitely fast but because of general relativity it seems not to from our point of view. There is no limit to how fast something can travel, just a limit to how fast it seems to be traveling from our perspective.

[@roboticoperatingbuddy5443]

Michael Stephens is the only man in the universe who can make me feel bad for photons

[@hannahslesinski890]

Beginning of the video: will headlights work at light speed? 10 minutes later: are you real, or is this all a simulation?

[@Numinor31]

yahhahahah

[@RottenLegacy]

You just described 100% of every Vsauce video. Congratulations.

[@randominternetprofile8270]

I don't watch vsauce anymore for that reason. It's gets to stoner mind blown shit too quick.

[@beechtownorganics7226]

Because you didn't understand what he wants to say.

[@randominternetprofile8270]

Harsh Deep me?

[@_arnavmathur]

8:04 - you know it's going more complex when that music turns on

[@ruufs2384]

DumBdum DumDum Boin Boin Boin BDum That was bad

[@jedjarvis2212]

VSauce Theme

[@b_f_d_d]

Especially 9:31

[@MohsinExperiments]

What if a student ask this type of question from his school teacher?

[@wta1518]

@@MohsinExperiments the English is strong with this one.

[@masonmalone9848]

11:55 Even though we can never reach the end of pi that doesn’t mean that after to 10^10000 digit there wouldn’t be another one. Given we are in a simulation, would the system itself not be able to provide the calculation necessary to give us that next digit in the same way that our computers could theoretically spit out the next number. Maybe pi itself was programmed in this manner so that the simulation provides what we ask of it without having its “entire value” stored?

[@twally87]

interesting point. But if we live in a simulation, doesn't it seem like one that hasn't been interfered with, updated, or changed in a fundamental way since it began? Laws of physics haven't changed. Pi in particular is wrapped up with a lot of these fundamental aspects of the universe. Why would the simulation continue to emergently "create" pi as we go along (change), but nothing else? Also, the theory isn't that *in lieu* of finding pi's end it shows we **aren't** in a simulation-- only that finding the end would be strong evidence to the contrary. Put another way, not finding the 'end' of pi doesn't say much about whether or not we are in a simulation, but a finite-ness to the number would point toward us being in a simulation. Until an end to pi is found, we continue to assume it can be calculated to an infinite number of digits, and no matter how large or sophisticated a simulation computer may be, it wouldn't be capable of calculating anything infinite to insert into the 'program'.

[@cap5575]

One of the best explanations of Special Relativity I have seen.

[@ttv0]

A Vsauce a day keeps the certainty that you exist away.

[@jamesrichard7736]

not true because he does not upload daily vids

[@jamesrichard7736]

but it is true though

[@jamesrichard7736]

stil is the truth i am not being rude

[@rstriker21]

r00d

[@The1337Eye]

keeps the *certainty that you exist away. if there's no possibility that you exist than you certainly don't exist.

[@Brandon_Jackson]

I can't walk to my refrigerator if it's always running

[@bmoneybby]

Nice

[@duckzen645]

your prfile pic tricked me

[@oscarhorstrup7229]

Okay, you got me with that profile picture.

[@thatonemajin3578]

i don't know, mine's pretty slow

[@theawesomecamel4469]

Ha.

[@Mike23443]

An easy explanation to this question is this: C is the speed of light, but it is also the speed at which everything in the universe travels at all times. Because C is your velocity through space, but space isn't just space. Space is spacetime. Everything travels through spacetime at the speed of C. But that speed isn't just across the physical dimensions. It includes in itself the speed with which you travel through time. An object you are holding in your hand may be traveling through space at only a few meters per second, but it is traveling through time at nearly maximum velocity, which sum of both of these will always add up to C. When you accelerate through space, you slow down through time and vice versa. You may not be able to travel at the speed of light, but if you were able to reach it, the simple explenation would be that, to you, the travel was instantenous. You can't perceive headlights going ahead of you when you turn them on, because the entirety of that travel period to you would have been a fraction of a nano second, which is already an understatement. C isn't just a speed limit. It's also a time limit, a minimum speed and a constant value all at once.

[@shuttleman27c]

Thats how you avoid a ticket. Drive so fast you can't see the officers lights turn on

[@Nathan-pk1tb]

9:13 You should’ve said “only 1 sun” to give everyone an existential crisis

[@ChrisSena]

Ha, that's what I was just about to say the same thing!

[@SpydersByte]

hah :D a good joke missed!

[@paulgascoigne5343]

Only 1 or 2? I can't imagine the solar system without 3, it would be really weird. Next you'll be saying we aren't orbiting Jupiter!

[@theblackumbrella4257]

This comment is looking pretty dumb in all those universes where people have more than 1 sun.

[@DaekoTan]

Wait, we aren't?

[@loopysausage]

9:14, are you telling me there's an Earth that doesn't have two suns? :|

[@durdleduc8520]

Yup. There is an Earth with only one sun. I know. Irregular.

[@thecorporatecat4337]

Lol. Imagine earth with one sun. That would be so boring. I pity those with one sun

[@Peashant2142]

+loopysausage He missed a golden opportunity to say "But Earth has only one Sun"

[@justinmcelroy7464]

Your telling me there's an Earth with 1 sun and another one with 2 suns I thought there was only the Earth with 3.

[@Familia_nepal_e_ahskanja]

+Justin McElroy What is "sun"?

[@thenerd6835]

9:31 every time I hear that music, I get some serious, serious chills. I don't even know why, it just reminds me of the sheer scale and majesty of the universe and how small I am compared to it, and it's honestly so terrifying xD

[@twally87]

maybe bc it's music with higher notes being played in reverse. The "uncanny" terror meme uses music playing in reverse for some of its creepiest sections and you might have associated that sound with fear.

[@Turrican60]

There's really nothing to be terrified about, in my view. It is what it is...it's always been that way...we have to accept such things because we have no choice...and besides, we're all part of the universe in any case, as our bodies are merely 'borrowing' the atoms that comprise them. This being so, there's no point in fearing the scale of the universe, as it's merely a relative term, and nothing more.

[@maxbananafun8193]

it reminds me of an intro from the call of ktulu by metallica in one of their concerts (august 23, 2019)

[@rubening]

Same. Well said

[@Hutch2Much]

i love how Vsauce starts talking about things like this and then gets into the idea that we live in a simulation

[@Tekrothebountyhunter]

Wouldn't it be weird if the Earth had just one sun? Imagine how cold it would get! Greetings from Taured

[@fahmikhairullah5501]

I understood that reference

[@fahmikhairullah5501]

***** No, it's from a short creepypasta, "Man from Taured" or something

[@Sam-TheFullBull]

Lol so you are from Kalos I assume, well I'm from Unova.

[@stampysaithelavacat1991]

um no i have 1 sun and its fine

[@thehorseformerlywithoutana2522]

No, but I can imagine how we'd look with two suns. Tatooine.

[@AlamOdson]

I started off wondering how a headlight works and I ended up questioning my own existence. Thanks Math!

[@brendanswords4659]

😂😂

[@CrewMotleyCrue345]

that makes 2 of us

[@baranxlr]

*meth

[@haydenhembree7015]

i ended up wondering how a headlight works and i ended up realizing im an idiot

[@user-rc8bb7yb1e]

indeed.

[@AndreasNV]

The answer to the question was more complicated than I was hoping for.

[@colle_slaw]

Universes being born out of black holes is one of my favorite theories, ngl black holes and the existence of the universe go hand in hand in my head

[@leightonpetty4817]

0:38 “And as always, thanks for watching”

[@isaacnewton7424]

Oooohhhhhhhh my gooooooddddddddd I commented the exact same comment. And now noticed yours ... Can't believe

[@GDJolem]

Thank you for saving 11 minutes

[@aidanbillings8325]

@@eternity44 im here too bitch

[@AGuyYouMostLikelyDontKnow]

12:04

[@micahphilson]

Wait... *Vsauce is filmed in a universe where earth only has one sun?!*

[@micahphilson]

It would have been hilarious if he had said with one sun, as if he were in that other universe.

[@Hawx32]

Well not really. That just means any parallel earth that has another amount of suns that our two old boys here. Maybe Michael lives in a universe with three or more suns, maybe with just one, maybe no sun at all ? What would be funny would be if they had only one ridiculous moon though.

[@flyingspacebrainedidiot]

Micah Philson yah obviously and I dunno about you but it's a FACT that there is only one sun and it's flat

[@patrikatammi]

Wait... ITS FILMED IN A UNIVERSE WITH A SUN?

[@nevolight1263]

Dabbing Flight Hilqrious

[@fritzweinzierl187]

9:14 imagine he said "one sun" instead of "two suns"

[@1Poiuytgfdsa1]

leave it to michael to give you an existential crisis at 2am

[@BlackGryph0n]

11:12 The problem with John Gribbin's theory I feel is that numbers don't exist within our universe and are therefor not confined to it's laws. They have laws of their own, which I don't believe would change from universe to universe. However, even if they did, any computer we created to calculate Pi would only exist within the "computer" that created our simulated universe, and could therefor only calculate Pi at the speed of the program it exists within. Also, since entropy in our universe is ever increasing, I'd say if we are a simulation, we are an active simulation that is continually being written (or actively calculated), so even if numbers were confined to this universe, and even if this universe were a simulation inside some alien super computer, we may never find the end of Pi as it may still be being written infinitely "faster" than we are discovering it. That's just my theory though.

[@X3nus90]

Also this theory is relevant only if the computer where our simulated universe running has the same architecture as our computers - which is very unlikely... If our universe is indeed running inside a computer in another universe, this computer probably has a completely different architecture based on laws of physics that don't even exist in our universe, making for us impossible to actually find elements of this architecture while living in a simulated world. :)

[@dawsonweleski5607]

Shut the duck up

[@AnstonMusic]

Yeah, all true, if they can simulate the whole of world, then they can easily simulate the irrational numbers real-time. I just think that simulating everything on the quantum level would require as much computing power in terms of space and mass that you would need a computer the size of a small universe itself. (Not plausible.)

[@Fenriswaffle]

There's also a couple of theoretical limits (sort of) like Planck length/time that would nod towards an imperfect reality/simularity. That there is a granularity even if the resolution is incomprehensibly fine.

[@aaronmonse3643]

>That's just my theory though. hypothesis.

[@iApplesaucey]

I would of legit lost my shit if he said ''you could be watching this in a universive with ONE sun, for those of you watching in a universe with one sun, that was probably confusing'' I would of actually questioned my existence more than I already do

[@woodfur00]

I live in a universe where the phrase is "would have," not "would of."

[@iApplesaucey]

whatever man, you know what I meant

[@Aeihd]

I thought this same things too, he should've done the one sun thing and blown all our minds lol.

[@masansr]

I was thinking something similar, only that we would've thought it was a joke, And we'd never know that it was not a joke.

[@HITTHEROAD19]

Hiedeler H hey dude, i wrote that on an english test once as a kid, and learned its something you get when you dont hear "would've" correctly

[@juunathan9823]

dude always make me question my reality

[@Photon69420]

As a photon, this was very emotional to me

[@lodewijk.]

When you go from headlights to the meaning of life

[@adamsteffen4965]

its called planning

[@annakrawczuk5221]

its called Vsauce

[@Johomaman]

its called its called

[@cirno125]

d00dle dude it is 42

[@mechanicalissues7669]

If I were driving at the speed of light I'd be pulled over for breaking the laws of physics

[@want-diversecontent3887]

Cacophonic Comedian I know this is a joke, but my inner nerdiness is unsatisfied. First of all, you wouldn't be able to be caught, because even if there's another massless vehicle, you wouldn't be able to be seen. Second of all, you wouldn't able to see them either.

[@mechanicalissues7669]

Raffy Tabingo Well said, amigo.

[@ifrazali3052]

Cacophonic Comedian greatest comment of of the past second

[@sc7761]

That's one good joke

[@rtx_____]

Ha. Ha. Ha.

[@hershes]

9:04 missed chance to say “but earth only has 1 sun”

[@Company-59]

What a fantastic video! You are a very good educator. Thanks a lot!

[@farticlesofconflatulation]

Note to self. Never watch VSauce while stoned.

[@Ryouski]

Always*

[@paulpaul-ub7mm]

@@Ryouski Only*

[@bigfood2001]

Meeee fucking tooo

[@lmd473]

Have never tried that lol, ill note that

[@TheOlav0509]

Very original comment on a vsauce video

[@maxbateman8176]

For someone living in a universe with 2 suns, Micheal just proved the existence of a multiverse

[@wolowolowolowolowolowolowo2417]

honestly want him to say 1 sun just to mess with us

[@vihaanchamiraju5466]

Nah he was just messing with us. We got 2 suns, Phobos and Deimos.

[@F59PHI]

@@vihaanchamiraju5466 those are moons

[@vihaanchamiraju5466]

@@F59PHI ik it’s a play on alternate universes where there IS 2 suns and mars has one moon called the sun

[@dmytroantoshyn3925]

They will probably just think it's a joke

[@adonisds]

@Vsauce The explanation in 1:40 is wrong. See this video: kzbin.info/www/bejne/eYbNpWZsiKlmnpo

[@ailblentyn]

The strangest thing I think about photons is that they have a wavelength and frequency - so, even though they are travelling at c, length contraction doesn’t work in the way you’d expect.

[@LKfan1234]

I wish he'd have said "watching this in a universe where earth has one sun"

[@cedmu7296]

that would be great

[@Bratze27]

wait, does your one only have one?

[@itsthecannon623]

mine has 4 suns :/

[@xebek]

Unfortunately, the author of this video will always observe the same number of suns as you, regardless of universe.

[@GuvernorDave]

This. The video would be simultaneously made by a different Michael who refers to the reality of his universe.

[@hammerheartdan6311]

Me: *watches this video to learn* Me: *ends up questioning my own existence* Thank you Vsauce, very cool.

[@bruh-mx2hf]

Meaningless

[@jithinmv6516]

😝😝😝

[@sneaky_01yt85]

Lol

[@Pain-eq1di]

Thank you Vsauce for being the channel which helped me experience existential dread for the first time.

[@carduran_1154]

I love how fast it scalated into freaking universe theories, which made my mind blow

[@kyleshaw4954]

11:59 “Irrational Numbers Keep It Real”. Now that’s a Tshirt I would buy. So many different ways to interprétate that.

[@tylerwantstobeacreator9936]

Who are you Kyle Shaw

[@holagola4115]

@@tylerwantstobeacreator9936 who are you Tyler

[@ishrakhasan53]

@@holagola4115 who are you gola

[@chocoblocko9]

@@ishrakhasan53 who are you Ishrak?

[@fake_satan2600]

Who is anyone?..... *Vsauce music starts*

[@zz-uk8iv]

topic - will headlights work at the speed of light; ending - we live in simulation...

[@MoMoxd4541]

k i hope is something good

[@dikshantchaubey1922]

Well yeah that's Vsauce's style. That's why he has over 11 million subscribers. Everyone likes to get their minds boggled and that's exactly what he does through his series of compelling facts and figures. If you tell him to explain a needle, he will take the explanation to the quantum mechanical level and if you're lucky maybe even to string theory until you finally say WOW THAT'S AMAZING! even though you didn't understand a thing :) XD

[@oledakaajel]

The ending is actually a maths pun.

[@DavidKnowles]

Like the avatar :D

[@gayrice3160]

Sladkoru i tought the spider of your profile was a real spider

[@clearballistictorso3154]

7:17 the sun is a deadly lazer

[@onddu2254]

9:12 he should've said: "Some of them include you watching this video, but the earth has only one sun" to confuse the crap out of us

[@tommykarrick9130]

I kinda wish the line had been “And maybe there’s a universe where the earth, only has one sun. For those of you watching in that universe...”

[@strazhusk7055]

How many suns do u have

[@tommykarrick9130]

Mike_wolf_404 depends who’s asking

[@ProfessorZanetti]

He did that joke in the other universe XD

[@anuj8825]

@@strazhusk7055 We'd hv raided Michael's house, then.

[@user-mz7cn9hq8v]

Every Vsauce video be like: Does sandwich always fall on the butter side? No, you can't travel to another universe by passing a black hole.

[@user-mz7cn9hq8v]

@ki kus +

[@mayrln]

0:15 hey vsauce, have you ever wondered why are leaves green? 11:34 ....so basically thats why your existence can't be proven to be true. and as always thanks for watching.

[@Dani-it5sy]

''Does sandwich always fall on the butter side?'' This depends on the price of the carpet..

[@cacnus]

@@Dani-it5sy don't forget the amount of light hitting the chair next to the carpet.

[@yamatoclassmusashi8830]

Or can you?

[@potatoorca7019]

This video still makes my head hurt 8 years later

[@danpodjed3114]

Irrational numbers could be using an algorithm generating these numbers per-demand, thus eliminating the need for infinite storage.

[@mahmoodmohammed240]

Damn he should've said "your Earth has one sun..." And "that was very confusing for you because your Earth does have one sun" lost opportunity.

[@jdizzletheweirdo9400]

Mahmood Muhamad Haha that would’ve been awesome ngl 😂

[@vnXun]

what if his actual Earth actually has 2 suns?

[@thepriestunknown3999]

Bruh y’all don’t have 2 suns?

[@muhammadbasit7644]

People in far future from different universe will see this say *lmao this guy is like Homer Simpson predicting future*

[@Rockaholic237]

In the universe where earth has two suns, youtube comments are discussing how funny that is

[@huyendang6731]

3:56 "... let's say this distance is a light second." Those are some big ass spaceships then lmao.

[@reduxdev]

lol

[@Akshit.vats.]

Lol

[@SparkyTM]

lmao

[@btat16]

Lmao

[@DecrareOld]

lmao

[@ren_03]

I'd be scared if my fridge measured my speed.

[@Melanie____]

The precision of everything and the predisposition for many things toward life on earth. Says to me that it isn’t all random but rather created. So we mesure our world in time space mass. But only light is constant and at the speed of light time stands still.

[@PlasmaStar-me1hq]

"ok! lets build a car made of light."

[@megalodon4272]

Hope Elon doesn't find this comment

[@harshgharlute9524]

69th

[@ronimughrabi4365]

Megalodon G lol

[@jakerussell135]

@@megalodon4272 I hope he does

[@ryanryan6981]

Harsh Gharlute f Axz

[@tetsiga45XxX]

I feel like half the time Vsauce is insanely brilliant and the other half he's just insane.

[@that_girl_jess]

Maybe you just don't understand

[@BiollanteSpawn]

Is there really a difference?

[@xavierthe9352]

BRILLIANT!!!

[@noahwilliams8996]

Who's to say there's a difference? Or maybe the times that he seems insane is just when you don't understand his brilliance? Or maybe he's always insane, but his insanity sometimes has some brilliance as a side effect? O.o

[@cortie891]

And there's a universe where he doesn't even exist.

[@einiusplonis7335]

@Vsauce I loved the analogy about the speed of light and how time will be "paused", same effect was written in "Three body problem" book by Liu Cixin at 3rd book, where humans developed lightspeed and was launching spaceships to reach an edge of the universe. In theory, if there is multiple universes (you have one), and if it's "bubbles" just sitting around in a looong distance, after some t, you will reach another universe? Right?

[@Dr.Cosmar]

I always assumed at that point they become dangerous physics breaking device mounted onto a broken physics device.

[@jennaavw]

7:11 idk about that, man. the more videos of yours i watch the more i'm convinced that literally no one knows anything about anything

[@jennaavw]

i don't even know if i'm real anymore. is this video even real?

[@justinsuckow939]

+Jenna Trowbridge I don't know are you? Or am I in your head

[@jennaavw]

+Justin Suckow ...I hope so

[@dicerosautismambient4894]

+Jenna Trowbridge I feel the same way.Sometimes I look at something for a longtime, after a while it starts to look virtual.

[@antonioluksic3752]

Matrix is everything. Matrix is life

[@WeAintGotNoMilk2011]

I can disprove the multiverse theory. If there's a universe for every possibility, then there would be a universe that knows how to contact our universe, and we would know that the theory is true, and not just a theory.

[@Fortstorm]

A) A scientific theory is not the same thing as a theory in the colloquial sense, so stop using that word wrong. B) For every universe that is contacted, there is also a universe that is never contacted.

[@TyphoonShuffle]

Have you considered the possibility that we are in a universe where this contact did not happen?

[@Shinigginaz]

TyphoonShuffle But theoretically there is guaranteed to be a universe where they did choose our universe to contact

[@Fortstorm]

Shinigginaz Problem is we're assuming contact is actually possible. The physical laws of contact would be based on whatever plane all universes exist in, not the universes themselves.

[@Shinigginaz]

***** Exactly, I dont actually believe it is even possible. Just like time travel, theoretically it could exist but I just dont think its possible to do it.

[@lvrbad5588]

The explanation 1:40 is wrong. Light speed isn't a constant its only constant in a vacuum, other material slow light down when light passes through them due to electromagnetic interference

[@Ballindeeznut]

Heres an explanation from chat Gpt: In our current understanding of physics, it is impossible for a massive object like a car to travel at the speed of light (approximately 299,792,458 meters per second in a vacuum) as it would require infinite energy. As an object with mass approaches the speed of light, its relativistic mass increases, and it would require more and more energy to accelerate further. Therefore, a car, even if it were somehow accelerated to a very high fraction of the speed of light, would never reach or exceed the speed of light. However, let's entertain the hypothetical scenario where a car could travel at or near the speed of light and had functioning headlights: According to Einstein's theory of special relativity, when an object with mass approaches the speed of light, its relativistic effects become significant. Time dilation is one of these effects, which means that time slows down for the moving object relative to a stationary observer. From the perspective of the driver inside the car, they would perceive that the headlights turn on as usual because everything within their reference frame is behaving normally. However, from the perspective of an outside observer (someone not traveling at the speed of light), strange things would happen. For the outside observer, the effects of time dilation would come into play. They would see the car's headlights turn on, but they would perceive the light from the headlights as traveling at the speed of light relative to themselves, as it always does. The key point here is that the speed of light is always constant (approximately 299,792,458 meters per second) in a vacuum, regardless of the motion of the source. Therefore, even though the car is traveling at or near the speed of light, an outside observer would still measure the speed of light from the headlights as the same constant speed, just as they would for a stationary car. This might lead to some counterintuitive results, such as the light appearing to propagate forward from the headlights at the same speed, even though the car itself is moving at an incredibly high velocity. This phenomenon is one of the fundamental principles of Einstein's theory of special relativity.

[@carsonmorris127]

Beginning of video: would headlights work at light speed? End of video: if pi ends then nothing is real

[@vathsav182]

Woooo

[@nicolas-he2oe]

Vsauce in a nutshell

[@joexer1]

A simulation is real though. To be technical anything you can experience or conceive of is 'real'. Nothing is truly 'physical' however either way.

[@JediEdi]

mmm... pie

[@jamesedmond3351]

@@JediEdi with a slice of cheese, and don't forget the tip.

[@PropeIIant]

goes from a simple thought experiment to giving me one of the deepest feelings of existential dread.

[@And-cn8ru]

How did it go from "driving a car at the speed of light" to "questioning my existence?"

[@tylerjones7907]

Vsauce is a channel I watch a 3am

[@randalhopper3289]

It is 5am where I am right now

[@jajus1485]

same

[@secretagentfbi]

While smoking meth

[@ChristyCub]

It’s 3:22am and I have work in a few hours...😩

[@creeeeeeeeee4101]

You see freddy? Or pennywise?

[@JohnCroucherAU]

This explains why the clock in my car is always wrong

[@billdiebold5021]

Next time buy a Ford, those Chevy clocks don't work much better then rest of the car.

[@JohnCroucherAU]

My car is a Ford.

[@joecausey8508]

You've been speeding too much. Stop and let your clock catch up.

[@skunk_ink3954]

Someone else has been driving it?

[@Hardesteen]

John Croucher just drive forward to your destination and backwards to your home so youre clock can catch up.

[@davidpolansky3291]

correct me if i am wrong, pi isnt a part of the universe, it is a number that we made up to calculate the radius and so on of circles. And there is no perfect circle in the universe thanks to the plank size, so pi is not apart of the simulation, so it doesent need to be calculated.

[@wetarded1606]

The simulation thought process hurts my head because what if everyday that I wake up is a different simulation and only little bits and peices are changed

[@duprie37]

What this clip taught me: Irrationality keeps stuff real, except for light, which doesn't exist.

[@gonzaloortega5481]

Hahaha exactly

[@twally87]

light exists, it's just from its own "perspective" time does not pass, which is akin to not experiencing anything at all.

[@duprie37]

@@twally87 Time doesn't pass and space has contracted to zero for light. So effectively, from the photons perspective, nothing exists at all.

[@twally87]

@@duprie37 oh, ok. Perspective wasn't specified initially. Just straight up said "...light, which doesn't exist."

[@duprie37]

@@twally87 Well, it's a serious ontological question. If space & time do not exist for light (not in some kind of metaphorical sense but really, according to Relativity) then how exactly does light relate to the space-time we perceive it to travel through? What is objective reality at all? Just a mirage? The more I think about it, the more I'm convinced that's exactly what "reality" is. Just a projection giving us maximum evolutionary fitness.

[@oliversime4360]

Classic Vsauce turning a yes or no question into an existential mind fuck

[@thedeerguy7579]

Road sign: Drive like your kids live here Michael: _What If you drove a car at lightspeed?_

[@Yep_Yeah_Okay]

bro is breaking the multiversal fourth wall

[@TheLyonNetwork]

If you had enough headlight fluid they would.

[@brownhard]

rooster teeth reference??

[@SecretAssassin21]

brownhard RvB :)

[@willdanib]

Cheers, Gavin

[@joshuakim4493]

you are perpetuating the idiocracy of that statement still existing!!!! ...still funny though.

[@IsaacAutumn]

I was thinking the same thing!

[@Vsauce2]

Artificial simulation Kevin left this comment.

[@YodrizzleMashizzle]

Illoominarty confirmed

[@sharplyfast1]

wat

[@Eddef]

Kevin, my hero :D hey

[@FizzleFX]

Hitchhiker guide trough galaxy... your episode quiet has some similarity's about speed + want be eaten pigs :p

[@Emanon009]

How do you like you Pi Artificial Simulation Kevin?

[@maxwellj6652]

favorite thing about Michael is that he puts some random complex question for the title and then proceeds to explain multiple far out thought provoking ideas on the subject in a very good way. What I'm sayin is I always learn more than what I expect and I love it

[@ccandrew111]

Vsauce, for all your existential crisis needs

[@arcadicus_ezevius]

ccandrew111 I'd recommend Kurzgesagt too :D

[@avidcloud1721]

When I was younger, I saw this video, and proceeded to run around my coffee table like 80 times trying to slow down time so I wouldn't have to go to school. I was a dumb kid.

[@yusha1059]

Thats pretty genius. Actually.

[@araitol3935]

Imaginative kid

[@vaclavjebavy5118]

honestly sounds pretty clever for such a young age.

[@PabloCamaraP3C]

In reality, you didn't choose to do that, but you were chosen, in order to save the simulation from crashing

[@nikitalukashkin2023]

you will remember this on your death bed

[@swisscheez8424]

Video: "Hey Vsauce" Me: IM ALREADY CONFUSED

[@nathantowns2043]

Cixin Liu's novel Death's End imagines that the speed of light was once nearly, or maybe entirely, infinite but immensely powerful alien beings kept lowering it as a means of warfare against each other and some were trying to get it's speed down to zero.

[@SnowLeopard-lt1vf]

Albert Einstein: *Gets pulled over* Officer: “Do you know how fast you where going sir?” Albert Einstein: “Speed is relative” Officer:

[@bananya6020]

Officer: the point of relation is the speed at which one would move at had he been standing still

[@sebastianloessl7982]

Heisenberg gets pulled over. Officer: do you know how fast you were going? Heisenberg: no but I know where I am

[@engineered_images]

@@sebastianloessl7982 Officer: you were doing 55 in a 35 zone. Heisenburg: Great! Now I'm lost!

[@saulsavelis575]

speed is constant

[@foolishtoothpaste8935]

@@engineered_images Officer: That does not make sense. Heinsberg: Who told you that? Officer: Albert Einstein.

[@nautalyst2996]

An earth with only 2 suns? Preposterous! Ours has a total of 5!

[@IanHulett]

JimtheCreeper Wow. Only 5? Lame. The scientists in my universe are still discovering new suns. So far they've discovered 367,429, and are discovering more at a rate of 121.339 on average per decade. Scientists estimate that there may be as many as 367,430 stars in our system. We thought it was our galaxy, but it turned out to be a bunch of suns that orbit each other we were discovering. None of them were orbiting a black hole(in our universe, a galaxy is what you call a spiral galaxy). Did I mention we have the ability to travel between universes in decades, and from galaxy to galaxy in 10 months(what our scientists call a decoth)? Yeah, we're badass.

[@400nm2]

JimtheCreeper Jim what are you saying? It's 3.

[@brianscaryboye9522]

My sun is a moon with a really thin surface filled with hot magma.

[@averysmith5911]

A solar system cannot have more than 2 suns orbiting each other of similar mass or it would fling some suns out

[@IanHulett]

kenneth choi What?