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Homework Help: Optics Instrumental with thins lens

  1. Feb 11, 2012 #1
    1. The problem statement, all variables and given/known data

    In a thick lens, how we do to get the primary and secondary principal planes

    2. Relevant equations

    (1/Si)+(1/So)=1/f

    3. The attempt at a solution

    I tried to get to get that with the Newtonian equation
     
  2. jcsd
  3. Feb 13, 2012 #2

    rude man

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    http://en.wikipedia.org/wiki/Focal_length
     
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