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Old 12-12-2007, 01:16 PM
San
 
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Default Is there anything in space that travel faster then light?


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Old 12-12-2007, 01:31 PM
bustersmycat
 
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According to the theory of relativity, no. Quantum mechanics suggests information transfer that is essentially instantaneous regardless of intervening distance so there appears to be a conflict. Where'd that professor guy go that answered that question about gravity? Need him now.
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Old 12-12-2007, 01:37 PM
Prof. Zikzak
 
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Nothing massive can ever travel as fast as light. Massless particles can travel at c, but can never exceed it.

There are certain things which can go faster than light, but they cannot be energy, matter, or information. If it was information, you could send a message to your girlfriend with it. For instance, if you shine a flashlight at the Moon, you can move the light spot across the surface of the moon from crater A to crater B faster than c extremely easily. However, no mass, energy, or information traveled from A to B.

In quantum mechanics, whatever travels between entangled particles is not information, and is more like the flashlight on the Moon. Just as an astronaut in crater A cannot send a message faster than c to his girlfriend in crater B using your flashlight spot, you can't send a message to your girlfriend using entangled particles either.

EDIT: No, I am not wrong about the moving flashlight spot. It takes a few seconds for the motion to happen after you twist your wrist, because the light has to get to the moon, because information IS traveling from you to the moon. But that is not what I am talking about. When it gets there, the SPOT ON THE MOON, not the light in your flashlight beam, can travel at greater than c, and easily at that.
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Old 12-12-2007, 01:41 PM
Mike P
 
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According to the current understanding, no particles can move faster than light. With that said, that does not mean an object can not traverse the distance in a shorter period of time than light travels. There are theories - mind you they are theories, that could make the distance in less time without exceeding the speed of light. There are theories like folding space, warping space, subspace, quantum tunneling. None of these techniques use normal space/time like light travels in, they refer to travel outside of normal space/time or at least slicing through curved space.
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Old 12-12-2007, 02:02 PM
Prof Who
 
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Relativity does not stop something traveling faster than light. It just says in order to accelerate to the speed of light you consume all your mass, so you cant accelerate from zero to travel faster than light.
If something inherently travels faster than light from its conception then relativity does not prevent this.
The question is does anything do this - that is unknown.
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Old 12-12-2007, 02:07 PM
centretek666
 
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Nothing with mass can reach the speed of light.

Sorry Prof, you are wrong about moving the flashlight. If you moved the light from one point to another, you'd have to wait for the light beam to reach the second point. Think about water from a hose. You swing the hose from A to B but the water stream takes a curved path and gets to point B in the same time it would take to get there from the hose.
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Old 12-12-2007, 03:59 PM
ANUGU S
 
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the particles that have imaginary mass can do so.first thing is that space &time r not differrent in either real imaginary time
so far predicted particles r tachyons it is sames as time travel u may pose a question 2 me that if we travel in time &kill the g.parents.wont v die in our universe.If a particle with ordinary vel. is to be accelerated, acc. lorentz equations its mass increases .On accelerating itits mass would become larger&it becomes harder to increase its speed. by the time it reaches C,its mass would become infinite i.e. it would have taken infinite amount of energy from surroundings i.e no surroundings will be left.
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