Quote:
Originally posted by emporium@May 27 2004, 09:37 AM
Light can travel at faster than c in a medium?
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I'm guessing the source of confusion is that things can travel faster than light in a medium, producing Cherenkov Radiation. You are right that light goes fastest in a vacuum, and slows down in glass or water.
There was an experiment a year or two ago which seemed to show some information travelling faster than light, but I think it was debunked.