What travels faster than light?

Question

What travels faster than light?

Answer 1

I like the answer above. If you were to shine a laser at a surface that is very far away, you could theoretically move a dot faster than the speed of light. However, you still would not be able to convey information from one point to another point any faster than light. Seems that no matter what you can come up with, you can't violate Einstein's law.

One more point also, theories of big bang inflation also allow for the expansion of the universe itself, for a period of time during the initial stages of the big bang, to be faster than that of light. But this applies to everything in the universe simultaneously and all points travel away from all other points. This still doesn't violate relativity since information still can't be passed faster than light.  

Answer 2

Well theoretically nothing can travel faster then light. But if anything DID it would be called a tachyon. So hypothetically a tachyon travels faster then light.

Answer 3

space/time

Answer 4

Nothing is faster than light. Light travels at an amazing 180,000 miles per second so given that information there is hardly anything imaginable that could travel faster than light.  

Answer 5

Nothing.

Answer 6

Rumours (hehe), well actually nothing (if you believe Einstein).

Answer 7

The phase velocity of deBroglie matter waves. This does not contradict special relativity.

Answer 8

A geometric point (which by definition has no mass) can move faster than light.

If you had a pair of scissors the size of the solar system and closed them rapidly, the geometric point where the two scissor blades meet would be advancing faster than light by the time this point crossed the orbits of the outer planets.

Answer 9

Light traveling in a vacuum, would travel faster than light traveling in a medium.  

Answer 10

Our imagination only.

Answer 11

Lots of things.  Most of them are "phase fronts", like the point where the two halfs of a scissors meet, or the place where a beam of light hits something.  If you (on the Earth) shine a flashlight to the moon, you can move the point where the light hits the moon very fast -- much faster than light speed.

There are other things that move faster than light in air or water.  Light in water, for  example, moves at about 1/2 the speed of light in vacuum.  Scientist can make many things move faster than that.

But you can't move anything with mass,  or with information, faster than light in a vacuum.