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Optics - Refractive Index etc

  1. Feb 9, 2008 #1
    [​IMG]


    any idea what then?
     
  2. jcsd
  3. Feb 10, 2008 #2
    please help...
     
  4. Feb 10, 2008 #3
    Try to think of a relationship between theta and phi that will get rid of one of the variables.

    Then, what do you think happens when a function is at a maximum? (think calculus)
     
  5. Feb 10, 2008 #4
    sin theta = n sin phi ?

    the differential equals 0?
     
  6. Feb 10, 2008 #5
    Yeah

    so differentiate.
     
  7. Feb 10, 2008 #6
    i already tried that - i will scan in what i did
     
  8. Feb 10, 2008 #7
  9. Feb 10, 2008 #8
    but how do you differentiate that - i tried but came up with an absolute mess!
     
  10. Feb 10, 2008 #9
    Hmm, maybe try using trig identities?

    double angle formulas?
     
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