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Homework Help: Light Refraction

  1. Jun 1, 2008 #1


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    1. The problem statement, all variables and given/known data

    A ray of light strikes a piece of glass (n=refraction index=1.5), making an angle of 30 degrees with the surface. What angle does the refracted ray make with the surface?

    2. Relevant equations

    Snell's Law: n1*sin(theta1)=n2*sin(theta2)

    3. The attempt at a solution

    We're only given one n...how do I do this?
    Last edited: Jun 1, 2008
  2. jcsd
  3. Jun 1, 2008 #2
    Is the question assuming that it's coming from air?
  4. Jun 1, 2008 #3


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    Hi bfr! :smile:

    easy-peasy … you can assume that, for air (it is air, isnt it? :rolleyes:), n = 1. :smile:
  5. Jun 1, 2008 #4


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    OK, I didn't know we're just supposed to assume that n=1, thanks.
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