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Yet another question.


Auk

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I was wondering if there is something that can go faster than light. If an object, say a spaceship going the speed of light in between the sun and the earth would.nt the shadow on the earth go faster than the speed of light?

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Guest SpeedyString

An object can go faster then the known speed of light but can not go faster than the light itself. For instance, there is a theory about "strings". The string is an extremely concentrated amount of energy in the shape of a string and is so concentrated that only 3 feet of this string weighs the same as our own planet earth. The whole string theory states that because of this concentration anything close enough to it or in contact with it will greatly accelerate in speed. Therefor if light was near a string it would accelerate so you could then move faster then the origional speed of light (if you were also near this string) and not suffer the consequences of so called "time travel". If you were to somehow move faster then light itself you would be away from earth for a mere year but if you return earth would have passed on one million years.

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An object can go faster then the known speed of light but can not go faster than the light itself. For instance, there is a theory about "strings". The string is an extremely concentrated amount of energy in the shape of a string and is so concentrated that only 3 feet of this string weighs the same as our own planet earth. The whole string theory states that because of this concentration anything close enough to it or in contact with it will greatly accelerate in speed. Therefor if light was near a string it would accelerate so you could then move faster then the origional speed of light (if you were also near this string) and not suffer the consequences of so called "time travel". If you were to somehow move faster then light itself you would be away from earth for a mere year but if you return earth would have passed on one million years.

 

huh? hold on. cosmic strings or superstrings. if you are talking about superstrings, you are a bit consfused.

 

edit: some galaxies do go faster than c RELATIVE TO MATTER, but LESS than c RELATIVE TO SPACETIME

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'']What are you basing this belief on?

 

I read this possibility in an article from a french magazine called Science et Vie. I did some research and found that the topic was still somewhat controvertial.

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It isn't. There are a couple cases that dont really count, like something to do with phase change, but nothing that carries any information, and certainly no spaceship. It is the most famous laymans result of Einstiens work, and as a rule it sounds quite restricting, and doesn't actually make much sense unless you understand the physics. As a result, there are always tons of people who try to figure out ways to get around it, or claim that it is possible. Those who do tend to know nothing about the physics they are talking about. We've had tons of people come on to these forums claiming to prove relativity wrong in this regard, people seem to like to argue against it for some reason.

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like in Kaluza'a theory?
yes, but rather the extention by Klein, who claims the 5th dimension not to be independent. generally, as i have posted in another thread, i wouldnt say the reality we perceive is the absolute level. we're just bounded into a small place, squeezed into a system where we exist. there might be other forms of reality (and energy) which we cannot see (yet).
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