What If Light Was Really Slow?

[@Alister222222]

It's funny to think that all of these effects *do* happen in the real world, but at such tiny magnitudes we could never notice them.

[@darkclownKellen]

Have you ever done DMT?

[@Deus_1]

@@darkclownKellenthat’s not noticing the effects. That’s your brain simulating the noticing. Still cool though

[@HeartDigger9]

​@@darkclownKellenLMAOOOO

[@hashbrown777]

We're too used to thinking our sight shows us the state of the universe at that moment. It really trips people up when they try to do thought experiments. Sight is a collage of different moments in the past

[@ac281201]

We actually can notice it, for example the redshift of far away galaxies is just them moving at relativistic speeds away from us. Granted, not with a naked eye but still

[@alice672]

Anyone who wants more like this should play "a slower speed of light" a short physics game that explores alot of these concepts!

[@seraphik]

i played that once. I've never been so motion sick in my life 😅

[@eh86055]

Velocity Raptor is another good one.

[@Heavenira]

o neat! thanks for sharing. nice little showcase

[@hatetheantichrist]

ywnbaw

[@GRAVESGGS]

velocity raptor is an interesting physics game based on the physics of light as it speeds up and slows down

[@CCABPSacsach]

“I’m not bad at drawing perspective, I’m just… experimenting with lower speeds of light.”

[@naiknaik8812]

so real

[@arioniscool]

Lol

[@aceman0000099]

Yes, this... Staircase happens to be ..moving at 85% the speed of light... somehow

[@k___________]

you'd have to be even more skilled if you wanna draw perspective experimenting with lower speeds of light

[@CCABPSacsach]

@@k___________ oh no, you see, the objects are all accelerating at DIFFERENT speeds relative to each other. So uh, yeah, I’m not bad at art, this side of the desk is just moving 80% at the speed of light relative to the other side.

[@andrekuniscki]

I can only imagine what if Albert Einstein was alive to see computer simulations like this, what would be his reaction to the consequences of his work. Amazing video!

[@marioduvi8643]

@@pahub9256bro what 😭

[@tigerkingboss9106]

​@@pahub9256no i wasn't

[@caethecritter]

@@pahub9256he was not lmao

[@brawldude2656]

@@pahub9256bro what

[@Omegathyst]

​@@pahub9256bruh what are you smoking no he wasn't

[@koberburwa]

It's kinda crazy that we've evolved to collect and process such great amounts of information just by picking up on particles bouncing off of each other.

[@MisterFoxton]

You can detect a small piece of metal (like a coin) from dozens of metres away because the very slight shock wave of it hitting the ground changed the air pressure around it by an amount so small only a single bone in your body is delicate enough to feel it. With that fraction of second change in pressure and nothing else you could probably tell me where to find that coin.

[@aligator6010]

​@@MisterFoxton ахах, реально. Я залезала на скалу и у меня упал запасной карабин. Я услышала, как он отскочил от мата и упал где-то. Когда я спустилась я по памяти смогла найти, куда упал карабин. Но да, карабин тяжелее и больше монеты.

[@MisterFoxton]

@@aligator6010 Its amazing not just our hearing but spatial memory is so precise.

[@Crazytesseract]

Stop believing modern biologists that we have evolved. There is no scientific proof for evolution. Someone has designed the human body and one must be keen to know who.

[@Princesssmelly]

the thought of that just scared me and made my heart jump

[@6root91]

This makes me appreciate the fact that light is essentially instantaneous in our day to day lives- as in not really discernible with our naked eye.

[@jamesphillips2285]

It becomes noticeable over the Internet. Speed of light in copper and fiber optics is about 2/3 the speed of light in a vacuum. That is about a 200ms round trip time around the world.

[@jennyanydots2389]

@@jamesphillips2285 And with replies, it's very hard to be that gay. How do you accomplish it son? I wanna know boy.

[@ledoynier3694]

@@jennyanydots2389 you don't need to ask about a skill you seem to already master ^^'

[@jennyanydots2389]

@@ledoynier3694 You don't tell ME what to do son!

[@th3r3dr3dkroovy]

@@jennyanydots2389your name comes from cats the musical you’re in no position to be using gay as an insult

[@HumanityAsCode]

If you've ever read the Three Body Problem series this is not only a great visualization but it also recontextualizes the horror of reduced light speed zones.

[@ablone]

Makes you wonder how people in black domains lived if merely walking gives weird trippy effects

[@856Dropout]

Such and impressively depressing conclusion to an impressively creative trilogy.

[@ChaoticNeutralMatt]

​@@ablonebeing able to sense light would be trippy. Not seeing in that case would actually be.. fine?

[@856Dropout]

Does e=mc2 hold up a such slow light speeds? Could we even walk around considering the energy needed to move at such a high percentage of C?

[@poppletronva]

I'm in the middle of The Dark Forest as well as a couple of Discworld books at the moment so this works surprisingly well for both 😂

[@huhneat1076]

There's only one thing I want to see out of this concept that I haven't yet: Making light also experience gravity like it does in real life. Basically, on a flat world, if you look up at 45 degrees, that's the furthest you can see, and looking higher is like looking back down at you, until you can finally see yourself directly above you. Edit: I only said on a flat world to _assume_ the earth is flat for the 45° number to make sense. In reality, the earth is not flat, it is spherish, so it's not exactly 45°. I love all the pedantic people online.

[@przemo12323]

That would only be true if the escape velocity of that world was higher than the speed of light. It might be counter intuitive to think that flat worlds also have an escape velocity, but when u think about it it's really not that different from real life

[@momov4060]

@@przemo12323 yeah but if light travels so slow, it cant escape the gravity of that planet. Which, i think, would also mean that the world would be invisible from the outside. Kinda crazy

[@SemlerCrafter]

​@@momov4060so basically a black hole

[@momov4060]

@@SemlerCrafter yeah it would be if nothing can exceed the speed of light, but since its only 10m/s I surely hope that things can still go faster then that haha

[@mytiliss682]

​@@momov4060that's really controversial topic. If speed of light is reduced, speed of other interactions reduced too. That will cause most of the universe to dissolve because things aren't connected with each other, just like in the Big Reap theory.

[@Oscaragious]

I think what would've been great is to show a side-by-side comparison between the slowed light and the normal lighting.

[@brokenocci]

and different speeds slowly decreasing. I found 10m/s too slow to fully understand it

[@primenumberbuster404]

​@RepentandbelieveinJesusChrist5 Your gate is too narrow for my phallus.

[@ThatJellydude]

@RepentandbelieveinJesusChrist5🥱🥱🥱

[@pedrofreitas4662]

just look outside idk

[@scimastory]

4:18 companies in june

[@matthias7534]

It's annoying, I don't want to see this degeneracy

[@c1nqbl7]

Lmfao

[@littlesnowflakepunk855]

Would love to see some of these things taken into account for VFX around near-lightspeed and faster-than-light vehicles in movies

[@jackpowell9276]

Weirdly, we've had such cook fantasy effects, that the "real" thing might just look a bit low budget lol.

[@MushookieMan]

Normalize accurate physics

[@jbmst1450]

due to time dilation, everything would appear normal during near/faster-than lightspeed travel, so movies are still correct in their representation

[@evilspoons]

You do see some redshift/blueshift in FTL travel in various sci-fi properties. I think they did this when flying at warp in the JJ Abrams Star Trek movies, in Interstellar, and in The Expanse when the gates become a plot point.

[@littlesnowflakepunk855]

@@evilspoons they do redshifting, i was more talking about the weird "rotation"

[@I_Love_Learning]

MIT made a game about light slowing down, with light shifts and warping buildings and all. I think it was called "The Slower Speed of Light?" Really fun.

[@jennyanydots2389]

Fun like what? Beeting your dawg until his teeth break out his mouf?

[@zacharyc6549]

​@@jennyanydots2389you have a reason for being spiteful or do you just want to piss people off?

[@jennyanydots2389]

@@zacharyc6549 Spiteful? What I said might have been inappropriate in other ways but not because it was spiteful. I'm not a total moron, if you're going to try and troll a troll you're going to want to make sense, okay son?

[@crristox]

@@jennyanydots2389 yo what you have issues

[@jennyanydots2389]

@@crristox All dogs are hell spawns of satan, bred in the pit of despair known as my mother's uterus.

[@puttputtthetruck8805]

watching this I thought you would have had millions of subscribers, this is insanely high quality!

[@potatosalad68]

I predict him to have 150k subscribers in less than two years from now

[@kcsnipes]

For some reason I didn’t watch the whole video I recognize the quality and effort but didn’t hold my attention 😅 but perhaps this channel does get more recognition, deserved for the effort alone, I hope so 👍

[@Scyth3934]

Same! Good job!

[@Jowanoofy_ZO]

Keepp hearin dis SUBSCRIBER DOEST MATTER -

[@EverydayRoadster]

Launched just in time one year ago, the Z-army still has plenty of money to spend it seems.

[@andyowens5494]

It gets fun when those movements come to a sudden stop too; the buildings nearby stop soonest, and the distortion unwraps in concentric rings - so the parts of the buildings further away appear to continue moving until the distortion is removed in the static state.

[@TheHazbean-ks3gi]

0:45 FINALLY!!!! I was having an argument with my mom about the Doppler effect on light, and she said that it only affects sound, but I argued the opposite, that it affects both, AND I WAS RIGHT HAHAHAHAHAHAHA

[@jhonnya6032]

Dude, what you've been talking with your mother? Lol

[@Nudelllsuppe]

Absolutely based Family

[@TheHazbean-ks3gi]

@@jhonnya6032 oh we just talk about physics stuff randomly for no apparent reason lol😂

[@spythere]

​@@jhonnya6032Healthy families talk about everything and nothing. It's nothing unusual, imagine discriminating on the internet because people talk with each other about various topics widening their knowledge, lol. What a sad world we live in...

[@jhonnya6032]

​@@spythereDude, get a mirror, it was just a note on his comment LOL, discriminating? Lmao, get off the internet bro

[@artherra3185]

I remember the light Doppler effect being a thing people discuss when talking about black holes and why with rotating black holes, one "side" (the half of the black hole's disc that is moving towards the viewer) will always be brighter than the other (which is moving away) creating a sort of "false star" in the accretion disk; it was incredibly cool to see this effect explained in detail and explored in motion in a way that is very easy to understand and to see how it affects mundane objects, especially the bending of the city! that part is also visually incredibly beautiful, a true piece of art in several shots. thank you so much for this!! excellent work!

[@jennyanydots2389]

I talk about when I shit in my pants.

[@bjornragnarsson8692]

Yes indeed. And the frame dragging effect makes the light moving away from you appear slower before speeding up as it wraps around, is gravitationally lensed above and below the equatorial plane, and reaches a maximum speed (and brightness) while wrapping around to become parallel (from your frame of reference) to your line of sight. A similar effect occurs if you were to look at the sky from the equatorial plane of rotation on a fast rapidly spinning neutron star. The light at one end of the horizon in the direction of rotation would appear blue shifted and moving across the sky quickly, but gradually slowing down while down shifting through a range of frequencies across the point perpendicular to your line of sight (looking straight up) and continuing to progressively slow more with greater redshift across the horizon opposite the direction of rotation.

[@pgc6290]

The "light doppler effect" that your are talking about ie the wavelength/frequency shifts is the most common and basic thing ever for physicists. So when he said in the video too, that i wonder if there is any such thing for light, i was surprised considering it is a physics channel. But i hope he just said it for narration purposes.

[@rhydlew]

I've been looking forward to the day when someone accurately depicts the view from a spaceship nearing c. You could be the first to do it, if you could model the aberration/lensing. Looking out of the front window there is blackness, no stars. They are blueshifted out of view, then at the sides and above the ship you see a dense ring of dark blue stars, forming into a rainbow of rings through to the red ring, then behind we see darkness, stars red shifted out of view. The aberration means that the stars were all moved forwards. So the ring appears closer to infront of the vessel than at the sides and above/below. The real cinematic spectacle would be an animation that shows all the stars lensing forwards, and then those in front blue shifting and disappearing, and then the rainbow ring forming as all the stars behind and to the side of ship, move forwards into that ring

[@crusatyr1452]

There is a pretty old game(more of a demonstration) I believe where you collect things around a map and for each one the speed of light decreases. "A Slower Speed of Light Official Trailer - MIT Game Lab"

[@ryalloric1088]

But stars emit light at a broad spectrum of wavelengths, not just visible light, so wouldn't the infrared get blueshifted into view in front, and the ultraviolet get redshifted into view behind?

[@rhydlew]

@crusatyr1452 yes that changes colors, but doesn't show the aberration effect

[@rhydlew]

@ryalloric1088 absolutely, I suppose I was thinking class M that emit mostly visible (Oxides). Yes the model could incorporate class O to class M so that the shifts represented the most abundant spectral types, that would be excellent. As class M are less visible, yes clever folks could factor all that in. For my selfish purposes I'd be happy with an initial basic model that simplified to class M only. I agree with your challenge though, if we're finally going to go realistic, let's go completely realistic. Then we can have relativistic travel that looks correct, as well as black holes that look correct, asteroid fields that are easy and safe to navigate, nebulae that arent dense, and maybe even spaceships that only make noise when accelerating directly away from you 😀

[@crusatyr1452]

@@rhydlew ah my bad

[@ryanpaez]

This really makes me think about how the conditions of earth and the universe are just right, for life to exist and feel the way it is. Thank you for this beautiful upload

[@yehezkielpurba4149]

no its not just right. it went through thousands of billions trial and error until we reach this result.

[@artifactU]

​@@yehezkielpurba4149 those 2 things arent mutually exclusive

[@alesxemsky]

5:51 that's basically me going for work every morning

[@lettuce6017]

1:29 bruh, this didn't need to go this hard 🔥

[@rosamilenamunozmunoz1781]

fr

[@osas9104]

I think it’s interesting how this still feels very natural even though it is nothing like we experience light all the time.

[@vhsjpdfg]

My reaction too, it's uncanny how natural it feels.

[@eatingtheleaf4659]

I think physics just… clicks with human brains. We can almost instantly tell whether a simulation follows the laws of physics or not, there’s just an instinctual logic to it.

[@osas9104]

@@eatingtheleaf4659 True, i mean we do have a lot of everyday hands-on practice.

[@gneu1527]

​@@eatingtheleaf4659some people can actually feel physics, and for example basketball players KNOW where the ball will go when they throw it. It's a weird thing I also feel and I think it's the sixth or eighth sence

[@WhyWouldYouTubeShowThis]

Even though i already knew most of the stuff said here it still was interesting to see the actual model, and all the information was told in a fairly non-comlicated manner, wich is a good thing when it comes to explaining stuff about light and relativity. You deserve more recognition for such high quality video production! This video alone was better than most things i saw on KZbin on the topic.

[@Stettafire]

Yes they should use this video to explain this at university. A nice visual to explain the concepts is great

[@TheDevourerOfGods]

Imagine walking into the street before getting hit by an invisible car.

[@Splarkszter]

better yet, you see that the car is far away but it hits you anyway. And while you are on the floor you see how it's comming closer and closer until you see the past you getting hit by a car.

[@enderthedark5843]

The speed of light is ALREADY really slow. On cosmic scales, at least.

[@strongarmdicksmash1933]

Uhhh. I'm two meters tall.

[@wildfire_]

Any quantity humans can conceive is small on the cosmic scale. Take solar mass for example, the largest approximated unit of mass. It roughly equates to the mass of the sun, and is only really used as a point of comparison to other celestial bodies. It’s already mind boggling. Then you realise that we’ve seen stars that weigh 200+ solar mass.

[@tjakal]

As someone who writes gamecode and shaders I'm very impressed at the effects you've achieved here, this must've been done at the level of how the rasterizer and geometry look-up works if I'm not mistaken, all of my GG's.

[@CentreMetre]

At the end he said he used OpenRelativity, so i dont think he did write the shaders etc, not 100% sure tho

[@mryellow6918]

Tbh I bet half the effects would have not required coding and just have been a result of a functional camera.

[@_fudgepop01]

This is such a good video omg Describing it as “the ‘visual’ doppler effect” was THE thing that made it all suddenly fall into place in my head. Thanks a ton for this great explanation and demonstration!! I feel like i can intuit a lot more “speed of light” hypotheticals now (like those ones when people explain special relativity where someone is on a lightspeed train and shining a flashlight at you, who is not moving at all)

[@This_is_my_spout]

I thought the doppler effect was already very well known. It's very frequently mentioned in astronomy topics.

[@_fudgepop01]

@@This_is_my_spout perhaps, but it never clicked in my head what that meant in the context of light until this video

[@grzes848909]

this made me think that if by some miracle we found a way to move faster than light we would be traveling blind and how would we avoid obstacles if we can't see them ?

[@lupsik1]

That problem is already solved. You need Spice Melange and Navigators to predict the future.

[@CreepyMemes]

you need infinite energy to make mass travel at light speed, so it's mathematically impossible. Since light has no mass it's going at light speed. Also due to time dilation, approaching light speed will slow down your relative time, so in your point of view, everything else is speeding up. Thus at light speed your time will stop, and everything else will move at infinite time. Basically you would just arrive at the heat death of the universe in an instant. Photons don't experience time.

[@ssjcrafter8842]

@@CreepyMemes this could be a bit pedantic, but it's technically not an infinite amount of energy, just an amount that is impossible to get(I believe it's more than the amount of energy in the universe) also, presumably we'd have a way to stop if we could go at light speed(I'm assuming it's like a train but personal and instantaneous), so it more so means you'll have no awareness of what happened no matter how long it took to get to your destination...

[@panda4247]

but that is not possible. the speed of light is maximal. Even if you traveled at c/2 and shone a flashlight forward, the speed (from the point of view of the external observer who can see you moving at c/2) of that light would not be classical Newtonian c+c/2... it would still be c. FTL travel will not be achieved by moving physically faster than the light around you. It would be achieved (if ever) by creating shortcuts ("wormholes" or other bends in space). Inside that, you would still move slower than the light around you, just the distance to travel will be shorter..

[@CreepyMemes]

@@ssjcrafter8842 no sorry to say but you seem to not have enough knowledge about this topic. According to the theory of relativity, there's this formula: m = m0 / √(1 - v^2 / c^2) where m = mass of the object in motion m0 = rest mass of the object v = speed of the object c = speed of light so you can see if you know basic calculus that if v approaches c, then m approaches infinity lim_v->c m0 / √(1 - v^2 / c^2) = m0 / 0 = ∞ and we know that E = mc^2 so in this case the energy is infinite!

[@MikeyBarca02]

It’s kinda scary to think that if we were able to easily move faster than light, then if we look behind while going forward, all we’d see is pure darkness because the light would never reach our eyes. Actually I think this mechanic would make a great horror game in which an entity could be right behind you but you’ll only see it once you stop moving

[@207HappyToBeHere]

This makes my heart race The Terrel rotation is the coolest thing I've learned all year

[@Phonixem]

2:18 car turned gay

[@Cane4092]

And in the process, changed races too. Edit: i just realized how funny this is its literally a pun also

[@Danny5401]

It would be interesting to see a comparison on what it would look like if light moved much much faster. How stars and galaxies might look.

[@Danny5401]

@thebrain7441 true, as the expansion of the universe continues to speed up eventually it’s secrets will be locked away as well. If there are any civilizations, human or otherwise, they won’t be able to learn anything new due to light from different stars not being able to reach them.

[@4ae109]

I think if light moved faster, no changes would be apparent on Earth, but new stars and galaxies would pop up in the sky, and black holes would appear smaller because light would be fast enough to escape them. The internet would also get quicker due to fibre optic, but I don't know if computers would get quicker. Is the speed of electricity relative to the speed of light?

[@MrAlRats]

@thebrain7441 Actually, due to time dilation, if we could get a spacecraft to travel at close enough to the speed of light, we could get to the edge of the observable Universe in a single human lifetime from the perspective of the spacecraft and the crew onboard. However, the spacecraft could never return to Earth because tens of billions of years will have passed from the perspective of the Earth.

[@poppletronva]

I started the Discworld series about a month ago and light is described being super slow on the Disc. This is the exact video was I wanted ad a visual representation. This is amazing!

[@Flopsaurus]

Hey, same here! Loving the series so far!

[@stalfithrildi5366]

Turned out that the Speed Of Dark was actually slower. Buggrit.

[@maxweelus]

Fun Fact: This is actually how we first found out that Galaxies are moving towards/away from us..because the light they emitted appeared either more blue or red compared to our sun's light..and the only plausible explanation was that they are moving :-)

[@TheOneWhoAskedForYourOpinion]

thanks, now i imagine galaxies seeing us and being like "man fuck you guys, i'm outta here" before "slooowly" leaving

[@Scotty-vs4lf]

@@TheOneWhoAskedForYourOpinion its actually not slow at all, it just seems slow given the already massive distance between them

[@aurorapaisley7453]

​@@TheOneWhoAskedForYourOpinion their movement is actually faster than the speed of light

[@TheOneWhoAskedForYourOpinion]

@@aurorapaisley7453 mb, i meant "slowly" as in that it looks slow to us rn

[@xaviert.123]

0:19 thought I was having a stroke when I saw a New York ambulance with two tones before realising it was dubbed

[@idontknowanygoodnames1498]

It's only a matter of time until your channel becomes huge. This type of quality deserves to be at the top

[@jpolowin0]

Neat! One of my favourite science fiction novels is _Redshift Rendezvous_ by John E. Stith. It's set aboard a spacecraft which operates in a subspace layer in which the speed of light is 10 m/s, so relativistic effects are visible under ordinary conditions. (The author handwaves the technology which allows the passengers to survive the biological effects.) This includes the effects of the ship's artificial gravity on light.

[@TR4R]

I don't wanna play the nerd, but if somehow one day somebody finds the way to stop or reverse the shortening of the telomeres with each cell division, that will solve one if not the greatest factor in aging. Once that is achieved then we could potentially live forever as youngsters. At least it would avoid people to suffer the effects of time when traveling cosmic distances. But the food (energy), that's another issue.

[@tjpprojects7192]

Telomere shortening is only one out of the many potential causes of aging. There are already organisms that don't have telomeres that shorten, but still age regardless. While it will likely be an important puzzle piece, it is *NOT* a magic bullet for anti-aging research. At least not when many things like oxidation damage, epigenetic changes, and other things exist. Diseases like cancer and dementia should also be taken into account. Even with 100% perfectly youthful bodies, things like said cancer can physically kill, and dementia can mentally kill, which defeats the purpose of having an ageless body.

[@Neil_A.]

I was thinking of the same book. I didn't think someone else would mention it in this comment section. Small world!

[@worawatli8952]

2:50 The elongated car reminded me of the anime, Redline, they exaggerate speed by elongation.

[@gneu1527]

Every anime do that but nothing beats making an object warp from on side to another for 2 frames but have all the characters it hit react to the impact.

[@JonathanMandrake]

I think one part might be missing: Once the visible colours are shifted below or above the visible spectrum, other normally invisible wavelengths should get shifted to the visible spectrum, so the visible colour of the car should change around somewhat, and I think the darkening/brightening effects are a bit exaggerated, though I'm quite unsure about the second one

[@ironcode]

What I think is missing from this simulation is the length contraction / time dilation experienced by the driver. It would be interesting to see how that looks "from the inside", with and without the Doppler shift.

[@deinauge7894]

but that's what causes all the stretching, bending and rotating?

[@alexandred.4248]

That's just an optical effect from the light traveling at a speed comparable to the object.

[@deinauge7894]

you can see it this way. that's how lorentz thought about it. but there is no extra effect due to length contraction or time dilation. it's already built in.

[@trianglemoebius]

It would just look like everything else was contracting and dilating.

[@choppership465]

6:57 damn a german footballer provided a demonstration for us to see

[@SIDYfe4r]

🤣🤣🤣

[@talesghiu2753]

Incredible work!!! Extremely well done, lovely vid. Your channel deserves to expand!!!! Everyone, share the video to friends and family. This is good!

[@jennyanydots2389]

I only share sea men with my family. Freinds just get my butt sweat.

[@toranp.8942]

4:25 so this would theoretically be what traveling at the speed of light would look like?

[@samuunn]

Sonic going crazy with those colors

[@Sea_Leech]

​@@samuunnepileptic sonic

[@PlexiumGames]

Unbelievably good editing and production value !!! I can just tell how hard you worked on this and omg how long did it take?? Your going places!

[@jennyanydots2389]

It was so good that I shit my drawers two times boy!! So good. Filthy mess though, I had to throw those drawers and the pair of trousers I was in son.

[@skeletonwithagun2119]

Imagine something like turning on a flashlight in a world like this slowly pouring out like you turned on the tap

[@empty822]

1:05 well so he got to the space to make this cool intro

[@IHAVETOBECOMMUNIST]

And samolayk for uverennosti

[@adamosman2142]

This was one of those wonderful jaw dropping things to watch, the kind of feeling I had as a kid thinking about how big the universe is. Thankyou.

[@BrowniePembroke]

This concept makes me think about the 4th dimension When you changed the cube's velocity, you could see sides you couldn't see before, without any form of rotation The fourth dimension is depicted as being able to see all sides of a 3D object at once, just like we can see all sides of a 2D object at once. This scenario with the speed of light could be used to simulate a fourth dimension better because of this, but that's just a theory that popped into my mind. Great video!

[@phil4934]

it also seems similar to noneuclidean geometries

[@o_sch]

Its not really like that though because you also lose vision of the front because the object now catches up to the light it emitted faster and so less reaches you. Its more like you shift what photons actually reach your eyes.

[@budgetarms]

The 4th dimension is purely theoretical. There are several ways to recreate how a fourth dimension could work. But again this is purely theoretical.

[@YounesLayachi]

@@mapache-ehcapam "the" 4th dimension ? Time is a dimension, but not the 4th spacial dimension. We exist in spacetime, which is an inseparable combination of 3 space dimensions and 1 time dimension. Since we can't freely move forwards and backwards in the time dimension, then from our perspective it doesn't work as a 4th dimension

[@idifjrivhjf5198]

@@mapache-ehcapam There are 3 space dimensions, and 1 time dimension That said, the theoretical 4th dimension is always spatial and the answer is no

[@ParagonWave]

This video is so well made for the channel size. You deserve the million man, keep it up.

[@fspinacz]

Fantastic video! What I'd really appreciate is to have an overlay with current parameters (current speed of light, our speed (in m/s and in % of c), car's relevant speed) :)

[@kerz5383]

As someone who studied astronomy I was surprised when you said "can light have a doppler effect?" because I didnt even consider the doppler effect for sound, and we use redshift/doppler to compute the speed of stars and other celestial objects. Edit: I just reached the part where you said: "we need to look far away" and I was like yea no duh.

[@lawrencedoliveiro9104]

Our own spacecraft visiting other planets exhibit a detectable doppler effect in their signals back to us. This is used to measure the variations in their motion, which in turn give clues as to the mass distribution of the bodies they’re orbiting.

[@kerz5383]

@@lawrencedoliveiro9104 We don't use air particles to transmit data through space. Thus we never studied the doppler effect for sound.

[@lawrencedoliveiro9104]

@@kerz5383 I never said we did.

[@nsl.4994]

This explanation is similar to the one I encountered in 'A Slower Speed Of Light' which is basically a relativistic fun game that slows the speed of light to the speed of a stroll. I understand that just because we can't reach the speed of light, it does not mean we cannot know the effects of light speed. In 'A Slower Speed Of Light', the speed of light is brought down to a human level so we can experience the special effects of relativity and this video does the same. Nice 👍 I like it ❤

[@TheHortoman]

Oh true i remember seeing that game somewhere. You could see redshift happen in real time

[@matussemancik7762]

Great idea, great render, great commentary. Keep it up!

[@sidthixaychoummanivong5643]

So basically, if u looking through the farthest zoom telescope and looking at the other galaxy, you're actually seeing the past from millions of years ago because it takes millions of years for lights to reach earth and finally enter through the telescope lens?

[@minimooster7258]

Yes! The information we get from the sun is 8 minutes old, every light year away something is is a year it took to get to us

[@WildEngineerGamer]

Bro I love getting irritated with gamma rays while walking down the street

[@OverLordGoldDragon]

It's not just that "it *does* happen, but little" - *all* of it happens, simply by achieving said percent of speed of light. This "simulation" only changes the time scale - in speed, it's interchangeable with distance. So this clip's actually a clever way of visualizing approaching the real speed of light!

[@333maddoxtj333]

Too high quality content for such a small amount of subscribers, you're a seriously underrated creator.

[@ThatGhostsHost]

Fantastic work! The quality is insane. writing and examples are perfect!

[@Cp-71]

I got fascinated by near-light speed effects as a kid after watching a (now super old) video on youtube called Special Relativity Simulator - upon a rewatch it holds up remarkably well!

[@kinyacat5919]

If light is slower than a car moving towards you. You'd get hit before you could even see it

[@TheShadowofevolution]

This is why I take humanity's 'knowledge' of light with a grain of salt. We can not possibly create a control sample from our single pointed perspective

[@TheAlison1456]

3:34 that's nuts.

[@Sven745]

So detailed. You put so much work in this

[@jennyanydots2389]

He stole it from his autistic sister that the family keeps in the basement with the family dawg to avoid the shame and embarrassment. It's not right how they just let her go hog wild on that dawgs bee whole down there. No one goes down there except to change her diaper, clean up the dog feces and leave food in the corner. Well, and to steal her educational videos

[@arcticbeak]

This is one of the most interesting things I've seen in a while. Adulthood rarely introduces you to completely new things.

[@jeremiahnoar7504]

So remember, if you're late for work you can blue shift red lights into green lights by traveling at 14 million miles/h.

[@Splarkszter]

Meters per second please. Standarized units 😭

[@jeremiahnoar7504]

@@Splarkszter I could have converted it, but the number becomes way to big to be manageable then.

[@seto007]

5:42 how it feels to drive at night when someone decides to turn on their high beams

[@markokallaste]

For the quality of the information and this video, it is really underrated! Don't give up and keep on making these informative videos!

[@XcooldereX]

There is an old novel by Alexander Belyaev "Svetoprestavlenie" exactly about this topic. Basically, he thought that a world like this would be a world of ghosts where every movable object you see is no longer at the visible place. To not bump into each other in the street you need to wear a bell and ring it constantly while moving.

[@ZalansStudio]

4:42 Lazy Town be like lol

[@all3ykat79]

My brain changes the speed of light when I'm on LSD, how interesting. I wonder how.

[@taeahn6065]

I'm so happy to have to have seen this video. This is a sir this is a wendys momemt, but I'm crying and life feels so fulfilling

[@earpiercing]

1:12 HOLY SHIT IT'S PAC MAN

[@robotboi763]

This is nothing short of amazing, I hope you will produce more content like this

[@Ajhidd]

The thing that still blows my mind is that when we look at the stars - we see the past. The star itself may have died already, but its light has just reached us as we see it.

[@jsabuilds2404]

Imagine a video game built off of this concept.

[@tjpprojects7192]

And thus, everyone was horribly irradiated.

[@Typhis19]

In my opinion, these kinds of effects are exactly the kind of thing that is missing in most sci fi, I really thought when they did the reboot star trek in 09 they would have used a lot of these principles to visualize warp, unfortunately they really didn't think about that.

[@The_Lord_Nelson]

At 02:26: Why should the right side of the car turn black? It is still being hit by surrounding photons. These photons have the time to travel to us. They will be slow (10m /s) but shouldn't they be able to reach us?

[@xoskvr]

author of this movie has done many mistakes in creating this video...

[@emersonpage5384]

They will still travel, but because of the doppler effect, they have shifted out of the visible range. Like a very high or low pitch noise: there's still a noise there, just not the kind our ears are made to hear.

[@lIIIllIIl]

you might be able to see those effects with your own eyes, when you are traveling with the speed of light.

[@joemasters2270]

This is the trippiest element of our universe. I love it.

[@maximilianmunster8896]

get christopher nolan in here, we might have something for him

[@cmilkau]

the motion inside a galaxy is a better example of the Doppler effect. the redshifts of distant galaxies is mostly from the expansion of the universe, they are literally stretched, which is a different thing

[@mechanicalmonk2020]

It's still the doppler effect, as relatively the stars are still moving away from the observer.

[@sinamf5890]

It would be facinating if you could make a video, if the planck constant was much larger! The effects of quantum mechanics would be incredible

[@allahuneg4122]

what would that change?

[@jeremiahnoar7504]

@@allahuneg4122 It would also change the "size" of particles by charging the size of their wave lengths. with a big enough plank constant, id expect quantum phenomenon like tunneling, would apply to macro-sized objects.

[@columbus8myhw]

@adenosine2electricboogaloo647That happens in this scenario too (how fast does information travel through the body?)

[@weroniaks8890]

I love the fact that this video is as long as required time for light to reach earth

[@starsun7455]

If light, the observation medium, slows down, any object moving at a constant speed should be observed to gradually slow down. Basically, the speed of light is measured in a round trip, so the speed felt by observing the movement line with these cameras is different from the actual speed.

[@ehrenmann69]

Im sure if you keep going your channel will blow up. This production quality is so good 🤯

[@DRAG0N_FIRE]

Dude, this has been a topic that has fascinating me for such a long time, I'm so glad I randomly stumbled across this video. It makes me strangely happy that my personal theory that moving faster than light would result in darkness behind you and blinding brightness in front is, for the most parts, accurate. My other question has always been, what if you move at the exact, or very closely to the speed of light? My theory is that you would see a still image behind you as the light "tries" to catch up constantly. But I'm still not sure what you would see in front of you. Would your simulation be able to simulate this? I'd be most interested to see my curiosity sated visually!

[@noahglimcher5445]

I find that the car should stay green throught the motion, even at these relativistic speeds, because the car is not emitting the light, but instead it is reflecting it. Stars emit their light which is why you see the doppler shift for them. Simplifying this to a flat wall moving infront of the sun with an observer in between the sun and the wall. As the sun emits all colors for simplicity, it will have the light bounce off of the wall. The wall, like normal, absorbs all of the light except for green light because that is its color and the light bouncing off doesn't care that the wall is moving. In this example the wall seems green the whole time.

[@shebahammy]

The light is still shifted

[@Purriah]

I read the title and thought this was about death note, like what if Light Yamagi was mentally challenged instead of a genius

[@drummond3524]

same 😭 well the show would've been over a lot sooner for one

[@Purriah]

@@drummond3524 lmao

[@-TheFacelessGamer-]

There was a game demo type thing I saw someone play that is supposed to simulate what if light goes slower. As you collect some item, light gets slower and slower. I had to find the game. it was called "A Slower Speed of Light" and was made by MIT Game Lab. It demonstrates everything talked about in this video. As time get's slower, your view stretches as you move forward and the color of things shifts

[@sebbes333]

If you accelerate across the light speed velocity, will that generate a... "Photonic(?) boom" ? (like a "Sonic boom" but with light instead of sound?) How would that look?

[@malloryworlton6359]

I think it would look a little like Cherenkov radiation.

[@Vamanos46]

Electromagnetic pulsar ?

[@fonics3208]

Insanely high-quality content here, can't believe the views on this are only in the thousands. This channel is surely going to blow up!

[@Akita23]

Video sure has at the very least

[@-Raumdeuter.]

why is it that at 5:04 the buildings are curved bug the trees are not? is that just a simulation error?

[@SBImNotWritingMyNameHere]

Yea

[@mahdiyarrazavi-ij4hh]

Sadly yea

[@ethribin4188]

"Can light do the same thing? (Doppler effect)" What do you mean "can"? It DOES do the same thing. Its just very hard for us to notice.

[@kenanjames1991]

Thank you for this amazing sound design

[@smartalpha]

Lerman, if this is up to your reach, it would be great to see the camera goes into a sudden still and watch the light at even more slower speed recomposing the scene passively. Such as in the 5:30 scenario. First affecting shapes only and then affecting shapes and colors. 🙂

[@ofekn]

4:46 are you sure it's correct that the buildings appear bent? yea the camera has velocity, but the buildings don't move, when the camera reaches a specific point it catches the photons that already were "sent" from the building

[@esuil]

Yeah, I had to pause at that part and start thinking about it. Came to comment to look for an explanation as well. Makes no sense to me.

[@esuil]

Yeah, I found explanation, search for "Stellar aberration", should give you some results. I think TLDR would be: Because photon behaves in "wave-particle duality" instead of just particle, thus exhibiting wave properties, not just particle. Or better TLDR after I broke my mind trying to figure this out: Photons are fucked up. Will have to spend some load of time to actually understand this shit now.

[@cofinify]

I wonder if it's possible to apply this video to Black Holes, considering that gravity reaches such speeds as to hold light itself (to a point in which arguably, light would need a speed closer to infinity in order to actually escape) *I also wonder what would happen if light was f a s t e r* Cheers for the brilliant content!

[@Polai010]

If light was faster then the observable universe would be larger and you need to travel faster to achieve the same effects. The “black” part of blackholes would appear to be smaller. If light speed was infinite then the sky would be incredibly bright as we would see every star in the whole universe at the same time. None of the effects shown in the video would exist (other than at infinite speeds). I think Blackholes would only exist as an infinitely small point (the singularity) where you would need infinite speeds to exit.

[@alexengineering3754]

Imagine just geting sunburn by walking normaly

[@Mechsrule1]

Maybe I'm wrong but in my mind, if a car was moving as fast as the speed of light, I'd assume you wouldn't see it until it was right on top of you, at which point you'd see a big smear of where it had been before getting close, since all that light is traveling at the exact same speed the car is moving, it couldn't reach you before the card did, right?

[@Grass-q2e]

2:23 gay car