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Huygen's principle on waves.

  1. Oct 25, 2016 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

    Okay, it is not an assignment question. I am just looking for an explanation regarding something I read. Why is the diagonal distance travel time(^-1) equal to [tex] (n_2 - n_1){(\frac{1}{c_1} + \frac{1}{c_2})} [/tex] ?
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  3. Oct 25, 2016 #2


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  4. Oct 25, 2016 #3


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    Did you try to equate the two paths? If so, where did you get stuck?
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