Can anything travel faster than speed of light? if the answer is no, why?
364291
No, because according to Einstein's equations, to accelerate anything towards the speed of light would require more energy than exists in the universe (after converting all matter to energy).\n\nThere is a theoretical particle that never goes slower than the speed of light, but it has not been experimentally proven. They're called tachyons. http://en.wikipedia.org/wiki/Faster-than-light
334240
Well, completely aside from size, light-speed travel is currently impossible by our technology. When and if that technology is ever invented, I would say 'yes', because there is no such thing as wind resistance in space ^_^
867201
nothing can go faster than the speed of light (in theory) so the answer is 3*10^8
27573
No. There is no practical possibility. Humans can't travel at a speed equal to or greater than that of light.
989387
The only thing that can travel at the speed of light is light. So basically yes.
1063094
Being accelerated past the speed of light is impossible because of the nature of momentum.  It is not simply mass times velocity, but mass times velocity times gamma.  Gamma is a factor which adjusts for the fact that as an object's velocity increases, it has more kinetic energy, which, because E=mc^2, is mass.  Gamma is equal to 1/(1-v^2/c^2), where v = velocity and c is speed of light. As the velocity approaches C, v^2/c^2 becomes 1, and Gamma becomes 1/(1-1), or 1/0.  This means a massive particle traveling at the speed of light has infinite momentum.  It takes infinite force to accelerate to infinite momentum, so breaking the speed of light (for a macroscopic object with mass) is, according to current theory and law, impossible.\n\nHowever, other avenues for an artificial increase of speed are possible.  You mention a lot of them, and not much is really known about them, but it could be possible to warp space-time to let us effectively travel faster than light (like the warp drive in Star Trek).
148002
It's technically impossible for something with mass (like a spacecraft) to go the speed of light in our universe under the laws of physics.  As something approaches the speed of light, it gains mass.  In theory, if something were to actually go the speed of light, it would have infinite mass, which is impossible.  \n\nOf course, no one can say for sure.  Science fiction on television and in books have gotten around these rules by using wormholes, subspace, etc., none of which are known to actually exist.
72176
If you're asking about some mass being accelerated up to and beyond the speed of light, no it is NOT possible. Einstein theorized that the faster an object moves, the greater will become its mass. This increased mass would require more energy to accelerate it even more, which in turn would increase its mass, which would require more energy to go faster, etc., etc.,. Ultimately to get this object up to the speed of light would require infinite energy, and that's impossible. This isn't just theory anymore either; mass increase versus velocity has been observed countless times in modern particle accelerators.\n\nOf course there are plenty of sci-fi novels, TV shows and movies (like Star Trek and warp drive) where things move faster than light, but unless someone can find a way around Einstein and all the evidence that he was right we'll never be able to attain FTL travel.\n\nBy the way...worm holes don't provide a way to MOVE faster than light. So-called worm holes, if they exist at all, are nothing more than short cuts; going through a worm hole you'd still have to obey the speed limit imposed by Einstein.\n\nPersonally I hope that some day some radically new branch of physics is found that would allow us to get around Einstein, but right now it doesn't look too good.
746381
No, the laws of physics currently prohibit any type of matter from accelerating to light speed, since it would take an infinite amount of energy to do so.
77099
it would be called superluminal.\n\nyou can read more about it here - \nhttp://en.wikipedia.org/wiki/Faster_than_light
185055
The equations imply that it is impossible for any object with >0 rest mass to accelerate from below the speed of light up to exactly the speed of light. This is because, as has been mentioned, that would take an infinite amount of energy.\n\nThe equations don't prohibit an object traveling faster than the speed of light from the outset though. Photons have zero rest mass, and the instant they are created they are traveling at exactly c. If it were possible for a particle to exist that was traveling faster than c from the instant it was created, this would not be a problem for relativity. I'm not sure what it would imply about it's mass though. The name for such a particle is a tachyon (although there is no evidence these actually exist as far as I'm aware).
1048247
There may be objects (tachyons) that move faster than light, up to perhaps infinite speeds.\nHowever, nothing already slower than light can accelerate to or beyond the speed of light.
1035372
No! It would take someone of a stature in physics greater than that of Einstein to claim that the speed of light is faster or slower in other parts of the universe.  The speed of light is constant\nthroughout the universe and the reason that light cannot escape\na black hole's gravity is because the gravity is so strong. And that's due the amount of mass of the black hole.
1084779
According to some scientists, if you can get faster than the speed of light, you can cross time barriers by bending and manipulating the space-time continuum.  Also, some quantum physicists believe that the universe and all of existence is made up of separate, infinite numbers of dimensions, so time travel without going faster than the speed of light would essentially be traveling to a different dimension in a different time that is not too different from the history of our world.  That's pretty far-fetched, though.  However, I still believe in the possibility.  Nothing's impossible (almost).
758936
One of the fundamental assumptions of relativity is that there is a finite speed of causality.  Usually this assumption is stated "the speed of light is a constant", but I think the finite speed of causality statement is a better way of looking at it.  So if something could travel faster than the maximum speed of causality, then it could make events happen before it caused them.  That is assuming that relativity is true and that causality is a flexible concept.  If you assume that causes must preceed effects then there are two possibilities for the hypothetical object going faster than light.  1. there is a maximum speed for the object that is going faster than light, so just raise the speed of causality to that new speed and keep relativity  2. there is no maximum speed limit for the object and influences can travel instantly, thus one of the fundamental assumptions of relativity is false and we need to throw out the theory
25993
No.  No terrestrial object can travel at the speed of light.  If you were traveling at the speed of light you would literally dissentigrate from the millions of pounds of air resistance pinning you down.
134543
I believe that warp speed is supposed to be significantly faster than the speed of light (given that they sometimes consider three light years a minor detour), and it's not possible to go faster than the speed of light.  The concept of manipulating space in such a way that they can essentially create worm holes it less unrealistic, but is still purely science fiction.