Can We Travel Faster Than Light? | Understanding the Misconceptions of Science

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This video is episode 21 from the series "Understanding the Misconceptions of Science"

In this video, Professor Lincoln explains the various ways in which talking about the speed of light can lead to a misunderstanding of whether or not particles can travel faster than light. Learn why it’s more accurate to say objects cannot move through space faster than light—but space itself can.

00:00 Measuring the Speed of Light
05:30 Index of Refraction
09:10 Why Light Moves More Slowly in Material Than a Vacuum
10:57 Dispelling a Myth in Quantum Physics
13:39 Discovering the Cherenkov Effect
17:46 How Is Cherenkov Radiation Made?
20:10 What Moves Faster than Light in a Vacuum
24:49 Is the Universe Expanding at the Speed of Light?

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[tresajessygeorge]

THANK YOU...!!!
PROFESSOR LINCOLN...!!!
More clarity through this lecture...!!!
SCIENCE IS KNOWLEDGE AND LIGHT IS WISDOM...!!!
THANKS AGAIN...!!!

[jmanj]

This guy's presentation has improved immensely over the past several years. This was much easier to watch. Way to go, Doc!

[ShrimplyPibblesJr]

I love this guy on the fermi lab channel and I love Wondrium. It’s a win.

[squidly]

I agree the older videos were not bad but they were pretty dull and sometimes hard to follow. This video I feel has come a long way it felt engaging and interesting while being approachable and digestible further improving the transfer of knowledge and hopefully the retention of said knowledge.

[donald-parker]

hmmm. I've heard that c is the "speed of causality". Does this jive with space expanding faster than light? Also, time does funky things as you accelerate and speed up. I've heard that light "experiences no time" or that time stops when you move at the speed of light. So what does that mean to a region of space moving away from us faster than light. And at the 28:30 mark you say that an object whose light was emitted 14B years ago, and is now arriving at earth is currently 46B light years away. Concept of "currently" seems a bit mixed up. There is no universal time reference all observers can agree on. I do not understand this, but my impression is that there is much more to this that indicated. Fun lecture nonetheless.

[franciscojose]

30 minutes for pure information tank you enlightened channel

[JesseSwaney]

I've had a video out with the same title for almost a year now.. I'm at like 450 views lol.

[donaldduck]

I have observed the blue glow in electron vacuum devices, and it is not any sort of ionization effect in the tubes. We had tried to analyze the effect, but spectroscopic studies came up nil. Electron beams would create a blue glow on the anode much like a flashlight beam impingement but there was no intermediate spatial glow. We could also bend the beam around objects and still observe the surface blue glow. I have yet to hear any explanation for the effect.

[LightningNC]

_Humans will never be able to travel faster than the speed of light._
Well, not with that attitude.

[omsingharjit]

19:41 it doesn't explain that how that Light is generated in not Florescent Liquid like Water and why it only emits same blue colour instead of any Visible colour ?

[glennabate]

When you mess up and studer your supposed to cut that and redo it.

[sandeepuppal]

if we move faster and faster time slows down and at the speed of light then time is stationary, so does that mean that if space is expanding faster than the speed of light, the universe is going back in time

[carminefragione]

The way to be faster, is to not move at all. To escape all causes of time and space, and exit realism, like a quanta particle, can assume all the world to be one , in a single moment of steady state , one quanta on each end of the cosmos, can share the behavior, because all existence at some point, escapes all motion to stand absolutely still and thus disappear from things in motion and be everywhere at once, a spooky entanglement. Now while light moves through space by propagation in a field of all that is expanding , the light cannot catch up to the universal expansion of the entire world, so that a negative result can occur, while the light photon is like a quarterback running down the football field, the entire field played upon is expanding faster than the runner, and so the runner seems to be losing time, he is going backwards, because the goal post is moving away faster than he can run the field trying to make a touchdown. Maybe the real world is moving from the future to the past, and we are experiencing an illusion that time moves from the past to the future. Jesus said "With God all things are possible".

[joeblough]

So the universe is expanding and space itself is expanding? What is it expanding into?

[omsingharjit]

If you don't wanna wast your time to find the conclusion of this video you can just skip to 29:02 😅😅

[theyshouldhavenevergivenme]

Now on to the explanation of the greatest mystery in the entire video: the significance of this man’s hand gestures..

[fishdudeify]

Actually the idea that spacetime can move faster than light will be the key that unlocks interstellar travel imo. The Alcubier-White (sic) theory involves using gravity amplification to contact spacetime in front of you and expand it behind you, creating a "wave" that you "surf" to your destination. Theoretical at this point obviously, but if ever achieved is a convenient way to get around the time dilation that would occur if you were trying to linearly accelerate near light speed to your destination.

[duhmez]

Big mistake about the introduction of this video. There is actually nothing in science that is "Absolutely true." Science cannot declare anything absolutely true. And certainly, nothing going faster than light is for sure not absolutely true. It sure seems true, all evidence points to being true, but the word absolute is a whole different thing. The only absolutely true thing is that my mind and experience exists. That is all.

[mykofreder]

If you had the ability to compress, move, and reexpand space time you can travel at quite high speeds depending on how much compression is done, though doing it is Star Trek fiction.

[J-kjtdr]

Good Lecture. Especially for a laymen. I'm happy that Planck found out how small but sad we'll not ever find out how big, you can't measure something you can't see.