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Focal Lengths

  1. Apr 13, 2007 #1
    1. The problem statement, all variables and given/known data
    Why do two outer rays converge to a different focal point than the inner rays?


    2. Relevant equations



    3. The attempt at a solution

    The distance to the focal point of the inner rays is shorter than the outer rays, the light has to bend a lot more for the outer rays
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Apr 13, 2007 #2

    Kurdt

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    I don't think you've really hit the nail on the head. Think about the ideal shape of a lens and the actual shape of a lens.
     
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