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Time-varying refractive index

  1. Feb 20, 2015 #1
    1. The problem statement, all variables and given/known data
    Suppose, light is passing through a liquid whose refractive index is time-varying. What will be the path of light ray ? Will it be a straaight line or curve ?

    2. Relevant equations

    3. The attempt at a solution
    I think, it will be a straight line.
  2. jcsd
  3. Feb 20, 2015 #2


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    Are you certain the problem statement specified "time varying" and not a spatial variation such as refractive index of atmosphere with altitude?
  4. Feb 20, 2015 #3
    No spatial variation.
  5. Feb 21, 2015 #4


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    I agree with your reasoning. By symmetry, there is no reason it should start curving one way rather than the other.
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