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Dispersion And Such

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Posted by Nicholas on October 31, 2002 04:38:25 UTC

Technically, it is known that the phase speed of a photon (in other words, part of light) is greater than c. I vaguely remember an experiment that showed this to be true. In addition, quantum mechanics allows for instantaneous state transitions across any distance. For all intents and purposes, however, such phenomena are purely mathematical. Nothing that exists as an independent entity in free space can surpass the speed of light. Tachyons are theoretical and, even if they did exist, are probably beyond our abilities to detect.

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