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Light travel homework

  1. Dec 21, 2007 #1
    Determine the time it takes for light to travel 54 cm through glycerine in an aquarium.


    does anybody know how make an equation for this??... because I just have no clue with this one...
     
  2. jcsd
  3. Dec 21, 2007 #2

    Dick

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    You need to find the speed of light moving through glycerine. This is related to the index of refraction of glycerine. Look it up.
     
  4. Dec 21, 2007 #3
    it is 1.473 so than is it 10 power of 8 * 1.473?
     
  5. Dec 21, 2007 #4

    Dick

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    If n is the index of refraction, c is the speed of light in a vacuum and v is the velocity of light in the medium, then v=c/n.
     
  6. Dec 21, 2007 #5
    oh so this is it right? -> 2.99792 x 10 power 8 / 1.473 = v
     
  7. Dec 21, 2007 #6

    Dick

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    Yes. It would be even more right if you put units on c, like m/sec. So how long to travel 54cm?
     
  8. Dec 21, 2007 #7
    ok thankyou verymuch sir ^^
     
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