Can the velocity of light be overcome?

Question

TO existenz48162 :-> In such case, how is travel possible? and how can we go into past?

Answer 1

Not that anyone knows for sure. There have been proposals involving using something termed "exotic matter" (a hypothetical substance/material which no one even knows how to begin to look for or create which has a negative mass), perhaps most notably the Alcubierre drive (look it up in Wikipedia). But these ideas are just speculations with no real practical value at this time.

Aside from such ideas, we *do* know that you'll never get an ordinary rocket to go faster than the speed of light (or even get it to go the speed of light). The problem is that the closer to the speed of light you get, the more energy you have to expend to increase your velocity. So, to increase your speed from rest to a speed V1, it might take E energy. But starting from a speed V2 which is close to the speed of light, and increasing it to at speed V2 + V1, it might take 100*E energy. And this problem only gets worse the closer you want to get to the speed of light. In order to get to the speed of light, you would need infinite energy. As no one *has* infinite energy, we can't use any rocket or indeed anything that accelerates in the above fashion.

Answer 2

No. As soon as you begin moving the speed of light, or close to the speed of light, everything begins moving away from you at that speed as well.

And remember velocity means direction as well. Usually the speed of light is only referred to in terms of it's magnitude.

Answer 3

Well, tell now we are not even close.
I believe that nothing is impossible, but this is one exception!
I thought logically about it and I find it impossible; or at least we will have to invent many many things before that.

Answer 4

Superman says yes

Answer 5

anything moving at that speed becomes energy, so anything trying to overcome it would become apart of it