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Homework Help: Angle of refraction

  1. Mar 29, 2010 #1
    1. The problem statement, all variables and given/known data

    A low power laser is incident at the interface between crown glass (n=1.52), and air at an angle of 45 degrees. The refracted ray into air makes an angle with respect to the normal of the surface that is closest to ...
    Question 2 answers
    27.7 degrees
    41.1 degrees
    45.0 degrees
    62.3 degrees
    There is no refracted ray due to Total Internal Reflection

    3. The attempt at a solution

    I am trying to use n1sinx1 = n2sinx2 but i keep getting an error in my calculator
  2. jcsd
  3. Mar 29, 2010 #2


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    Homework Helper

    Re: Refraction

    Find the critical angle for crown glass using the formula sinC = 1/n1.
    If the angle of incidence is less that the critical angle use your formula to find the angle of refraction. Other wise..........?
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