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Optic physics

  1. Mar 30, 2013 #1
    Question: A biconvex glass (n = 1.70) thin lens is to have a +35-cm focal length. If the radius of curvature of each surface is measured to be the same, what must it be? Give your answer in cm to two decimal places.

    My answer:
    I used this equation 1/f=(n-1)*(1/r1+1/r2), I got an answer 50cm. Am I right or I missing somthings? still doubt
  2. jcsd
  3. Mar 30, 2013 #2
    I think this should be in the homework question section.
  4. Mar 30, 2013 #3
    Thanks richyw
  5. Mar 30, 2013 #4


    User Avatar

    Staff: Mentor

    Indeed, questions like this (solutions to specific exercises, whether they are actually assignments for a course or not) belong in one of the "Homework and Coursework Questions" forums. In this case, the "Introductory Physics" is the appropriate one.
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