Optics Problem

  1. Does anyone know how to solve this problem? I tried using the spherical interface formula (n1/p)+(n2/q)=((n2-n2)/R) and I get q=15cm which I cannot seem to relate to the answer provided (23cm). Anyone know the correct way to approach this problem?
    [​IMG]

    Thanks.
     

    Attached Files:

  2. jcsd
  3. wukunlin

    wukunlin 388
    Gold Member

    You probably need to account for the flat end of the rod as well.
     
  4. SammyS

    SammyS 9,016
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Is this a Homework problem?
     
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