The Universe - Light Speed / Speed of Light - Part 1/5 (HD)

A documentary about the speed of light, the ultimate speed limit enforced by the laws of the universe, and how scientists are looking for ways to exceed it; a look at what happens when we reach the "light barrier"; what could happen if we surpass it, and how the "cosmic constant" can be manipulated.

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[ThePayola123]

'To give up without trying is just giving up.'

Hoe very profound!

[TeHTwist97]

will we ever design something that can travel faster than light surely in the next billion or so years we would have developed something that can travel faster than light

[randy95023]

People that think something can travel faster than the speed of light sure must think Einstein was a simpleton. Even Einstein would have said "Maybe there's something that can travel faster, we just haven't discovered it yet." But that's NOT what he said. Light REACHES the cosmic speed limit. If there were no cosmic "speed limit" then light itself would travel faster.

And no, YOU are not smarter than Einstein...

[Woot831]

@Woot831 Now let's say you push the cart up to 99% the speed of light. The cart, which was originally 20kg, might now have a mass of 25kg; you now have to exert *more* force just to accelerate the cart the at the same rate as before. This continues onto infinity as you get closer to light speed, making it harder and harder to go faster. Ultimately, achieving the speed of light would mean the cart would have infinite mass; you can't possibly continue moving that, so you slow down again. End rant.

[Woot831]

(Haven't watched yet; don't know if this is explained or not)

People, the reason you supposedly can't go faster than light is because as you approach light speed, you start to *gain* mass (don't know how that's supposed to work). So imagine if you're pushing a cart with a mass of, say, 20kg. To move (specifically, accelerate [move faster and faster]) that cart, you have to exert a certain amount of force to overcome its inertia. (cont...see next post)

[SatanFang]

@Blankskeen Yeah, but they didn't know that in 2007 or whenever this was released.

[Blankskeen]

Light speed isn't the fastest thing

[maddogUK69]

@1800levso Consider your question in more everyday terms: if you have 2 cars travelling away from each other at 70mph, 1 hour later the cars are indeed 140 miles apart, but does that change the fact that they travelled at 70mph to get there? It does not. Your 'Point A and Point B' example is talking about a measured distance that is increasing, not an actual travelling object.

[1800levso]

in conclusion, point A getting away from point B beats the speed of light, if there was a limit, this would not happen, it may be a limit for the speed of light, but there is no limits for speed itself, so in conclusion Speed of light is not the speed limit of the universe. if I'm wrong then let me know, I'm not an expert just an observer.

[1800levso]

how can speed of light be the limit, if you have 2 laser both facing opposite directions turn them on at the same point, you are at the center, laser A travels at the speed of light, laser B travels at the speed of light, after 1 minute both of them would be at the same distance away from you at the speed of light, but From point A to point B, it would be = speed of light 2x. so there is no limits!!! if there was a limit, it would not be a way this would happen. where is the limit??