A Documentary About The Speed Of Light

Why is it impossible to measure the speed of light?
What is the speed of light in a piece of sugar?
Can light be slowed down?
Why can't you move faster than light?
…or can you, after all?

RYV Team:
Voice Over: Kent Bleazard

[veritasphoto]

This is just GREAT! Got me thinking about synchronization of clocks to measure the speed of light (in a vacuum). INTERESTING!

[DrMHErez]

Amazing episode. Would have liked more. Will check if the other episodes are similar and have more.
Great narration as well.

[clayz]

Light delight. Great graphics, artwork. One of these years we'll get how to travel but still not know how reality actually did it.

[mattenfeld]

I feel like I’m a pretty smart person and I’ve watch and learn a lot of thing especially relating to space and time. These were so awesome and put a new spin on things

[yolofullsend]

To maintain clock synchronization, you could synchronize the clocks in the middle and move them both apart from each other at the same speed.

[MarkHonea-dxmv]

Honest question-- if I travel at the sol in a single
direction and look precisely backwards would any light be visible at all?
Is it even possible to travel in one direction at any given time?
If I'm traveling at the sol and put my hand at arms length in the same direction and shine a light from a flashlight held in my other hand would any light reach my outstretched hand from the flashlight?
When at the sol, looking forward into a light wave of a handheld source whose source frequency falls into the visible light spectrum would the light remain in the visible frequency?
I am familiar with the red shift phenomena of light traveling away from my eye but not the opposite effect.

[kennyrosenyc]

If you take a candy bar and put it in a microwave so that it does not rotate and microwave it in short bursts until it is just about to melt you will find small regular soft spots on the candy bar. If you measure the distance between those soft spots and then convert that distance into meters and multiply that times the frequency of the microwave converted into hertz you will get a number that is pretty much exactly the speed of light in Earth's atmosphere. This is because all parts of the electro/magnetic spectrum move at the speed of light and microwaves are a part of that spectrum. In other words, you don't even have to be a scientist measure the speed of light.

[White_Night_Demon]

you're telling me if I want to into the future, I stay still and if I want to go back in time, I have to somehow go so fast that the y-axis becomes negative?

[curtcoller]

51:00 :) This is NOT a paradox. It's in fact the only reason why Einstein claims you cannot travel faster than light. But he forgets again - his own statements - "all is relative". What we "would see" on a planet 5 light-years away from earth is simply the light reflected towards us 5 years after the moment it left there. Okay? Well what we don't see is what happens there now.
If we had a super telescope showing the people in a city driving the streets and a car accident - that happened five years ago.
But it is completely false that we could "warn" the drivers if we would be able to travel to this planet with "light speed" and land at that location. First: because we don't know it happened; Second: because we would arrive too late. Only if we could travel faster than light AND would have seen the accident in our special telescope, only then we would be able to warn them. But that is not "a time machine". A time machine would allow us to get there - see the accident - travel again - and then warn the people. Do you see the difference? No paradox.

[MS--Y]

You place the light source in the MIDDLE, THE MIDDLE of the two receivers. Receiver A will get triggered and start the clock at the same time that Receiver B will be triggered. If the light source is split, as in the apex of a broad triangle, the light will travel from the apex at the equal distance at the the exact same speed and start the timers.

Receiver A does not reflect the light, while Receiver B DOES reflect the light towards Receiver A. When the light from Receiver B hits Receiver A, the clock on Receiver A is stopped.

Since the source of the light is split evenly, the clocks will be activated simultaneously.

[kruz]

35:00 Assumes the orientation of Space and Time is perpendicular to each other. How do we know that? It seems to make sense, but it operates on an assumption.
50:34 Information is theorized to move faster than the "speed" of light if the theory of quantum entanglement proves true.

[theoneway]

I was once a part of a long wave for 8 minutes at foxboro (gillette) stadium.

[JamesMckee-wkcl]

What if out there, there is a sivalisation that the speed of light can be first gear ??

[JoeBlowUK]

All those elements that were close to each other at the point in time of the big bang, then in a split second found themselves millions of light years away from each other, say: Hold my beer.

[RobertHouse]

Thanks for not making this fearful like many other channels like this do to draw views. Rob

[JungleJargon]

Actually GR requires a variable speed of light depending on the amount of gravity there is. The parameters to measure light’s speed change so light’s speed itself changes. It’s not complicated. The combined effect of time speeding up away from the center of a galaxy according to GR while the measure of distance increasing away from the center of the galaxy according to GR makes causation much faster. This is the reason for faster than expected motion of the outer spiral arms of galaxies and superluminal motion appearing to be faster than the speed of light while maintaining the speed of light because causation itself is faster. It’s also the reason we can see distant starlight in 6, 000 years because light travels faster between galaxies where there is very little gravity to slow it down.

[grimmmetals]

Could'nt you sync the clocks in the center and then have them both move an equal distance apart at the exact same rate before doing the experience? Time dilation would now be affecting them at the same rate, negating one being off, right? 🤔

[XOSean]

0:48 This is exactly what I've been thinking in the back of my head for a while now.. suddenly, I came across this video without even searching for it.. so I've come to the conclusion that our phones are not just listening to us but they can read our minds now. I know it sounds very cuckoo.

[patrickedgington]

Start with the clocks synchronized moving each half the total distance away from each other. Are they still perfectly synchronized? Perhaps not but they are very close to it. Now start the first clock when the light begins and the second when it arrives. Move the clocks back together and compare the time they are showing the difference is the one-way speed of light. It will not have to be perfect to know if light is constant or has a different value depending on it traveling there and back.

[stewiesaidthat]

E=mc. Mass converts to energy with acceleration. Once the mass reaches c, there is no mass left to accelerate. You can't go FTL because mass becomes light with Acceleration. And light cannot travel faster than light. That is why it is the cosmic speed limit.