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Homework Help: Reflecting prism

  1. Feb 7, 2009 #1
    1. The problem statement, all variables and given/known data

    a)What is the minimum refractive index of the prism in order for the light to reflect?
    b) What is wrong with this ray path for a reflecting prism?


    2. Relevant equations

    nisin(theta 1)= ntsin(theta 2)

    3. The attempt at a solution
    for part a, nt is 1, theta 2 is 90 degree, theta 1 is 50 degree,
    then i got ni = 1.3
    For part b, i have no idea about it..
     

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  2. jcsd
  3. Feb 7, 2009 #2
    the graph is attached now...
     
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