Possible Duplicate:
Is it possible for information to be transmitted faster than light?
If I move a long solid stick can I send message fastest than light?
When we communicate via radio waves or electric signals, those signals have a speed, which is ultimately limited by the speed of light.
However, if you move one end of a rod or rope in some kind of slider, the other end will make the same movement seemingly instantaneously. Probably, this is not actually the case, or a very long rod could be used for instant cross-ocean communication.
What forces affect this, and how does the speed of light play into it?
