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Homework Help: Optic question about a positive-meniscus lens

  1. Oct 10, 2009 #1
    i was asked to find the angle [tex]\theta[/tex], the height h2, and the back focal length in terms of the radius of curvatures. i'm really stunned that i couldn't draw a line. thanks in advance.

    http://img94.imageshack.us/img94/8336/lens.png [Broken]
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Oct 12, 2009 #2


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    Homework Helper
    Gold Member

    Hi mrquanta, welcome to PF!:smile:

    You must show some attempt at a solution to receive help. We are not here to do your homework for you.

    Why not start by calculating the angle of incidence (in terms of [itex]h_1[/itex] and [itex]R_2[/itex], via basic geometry) of the oncoming ray on the leftmost surface?...What does knowing that angle of incidence allow you to calculate (via Snell's Law)?:wink:
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