- #1
kfx
- 12
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I was wondering whether it makes sense to talk about "speeds" faster than the speed of light. For example, Wikipedia mentions that the "speed" of quantum entanglement has a minimum lower bound of 10,000 times the speed of light. - http://en.wikipedia.org/wiki/Quantum_entanglement#Concept
But I've heard that the concept of speed faster than light is meaningless, because for any space-like interval there exists a frame of reference where the start and end points occur "simultaneously", i.e. the speed of communication is infinite.
That is, if one can reach c+1, then one can reach any speed by changing the frame of reference; including communications back in time, i.e. time travel. Why does it make sense to speak of speeds like 10,000 *c?
But I've heard that the concept of speed faster than light is meaningless, because for any space-like interval there exists a frame of reference where the start and end points occur "simultaneously", i.e. the speed of communication is infinite.
That is, if one can reach c+1, then one can reach any speed by changing the frame of reference; including communications back in time, i.e. time travel. Why does it make sense to speak of speeds like 10,000 *c?