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Goldfish bowl index of refraction

  1. Oct 10, 2009 #1
    1. The problem statement, all variables and given/known data
    To a fish in an aquarium, the 4.30 mm-thick walls appear to be only 3.10 mm thick.
    What is the index of refraction of the walls?

    2. Relevant equations
    n_1/s + n_2 / s' = (n_2-n_1)/R
    m: magnification
    s: object distance
    s': image distance

    3. The attempt at a solution
    n_1/s + n_2 / s' = (n_2-n_1)/R
    1.33/s + n_2/s' = (n_2-1.33)/R

    I'm not sure what R, s, or s' would be.
    If I plug in the numbers I received from determing the magnification, I receive this:

    1.33/4.33 + n_2/3.1 = (n_2 - 1/33)/R
  2. jcsd
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