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comment Is it possible for information to be transmitted faster than light by using a rigid pole?
The only spot that can in fact travel faster than the speed of light is the conceptual spot: You may immagine a point on Mars and point to it with your finger, and then immagine a point on Sirius and move your finger to point to that. And the reason the conceptual spot may "travel" this fast is that it never actually needs to make the distance. In mathematics we would say they were vectors determined by a length and a direction -- in order for the spot to move you only need to change two numbers, nothing actually needs to move, and no signal is transmitted neither.
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comment Is it possible for information to be transmitted faster than light by using a rigid pole?
@Eric, and possibly @webb(?) a common misquoted example is that of the spot of a light cone that may travel instantly from one end of the sky to another. In fact the light cone will suffer from the same bending as the rod or the water from a water hose when you spin about yourself.
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revised Is it possible for information to be transmitted faster than light by using a rigid pole?
added 700 characters in body
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comment Is it possible for information to be transmitted faster than light by using a rigid pole?
unfortunately still not. Pulling and pushing is the same thing, the only difference is the direction.
Dec
23
answered Is it possible for information to be transmitted faster than light by using a rigid pole?