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Homework Help: Self-Reproducing Rays in a symmetric Resonator

  1. May 23, 2008 #1
    1. The problem statement, all variables and given/known data

    Self-Reproducing Rays in a symmetric Resonator. Consider a symmetric resonator using two concave mirrors of radii R separated by a distance d=3|R|/2. After how many round trips through the resonator will a ray retrace its path?

    2. Relevant equations

    3. The attempt at a solution

    i dont know where to start and equations to work with
  2. jcsd
  3. May 23, 2008 #2


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    I'd start by looking up the focal length of a mirror of radius R.
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