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Light through a medium

  1. Nov 29, 2007 #1
    I understand that the speed of light in different mediums (like water) is slower than that of light in a vaccume. I've also read about some expiriments done in which light had been slowed down to a quite imaginable speed, like 70 Km/h. What causes light to slow down in such instances? Is it just bouncing around a lot, or do the photons actually change speed? If the photons chance speed, WHY?!
  2. jcsd
  3. Nov 29, 2007 #2


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    You may want to start by reading an entry in the FAQ in the General Physics forum.

  4. Nov 29, 2007 #3
    Ah! Sorry, I'll check that first next time.
    Thank you for your help.
  5. Nov 29, 2007 #4


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    Nevertheless A.I. welcome to these Forums and keep asking the questions! :smile:

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