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Refraction using Snell's law - critical angles

  1. Sep 13, 2009 #1
    Is it possible for the critical angle to exist when light goes from water (n=1.33) into glass (n=1.5)?

    I solved this using snell's law.

    and my answer is no..
    because glass has greater refraction index than water. And when you use snell's law and solve for the critical angle, there will be no value.

    is my answer right?
    Last edited: Sep 13, 2009
  2. jcsd
  3. Sep 13, 2009 #2
    Re: refraction

    You are right.
  4. Sep 13, 2009 #3
    Re: refraction

    yes, there is TIR only on going from denser to a rarer medium. your calculation is right.
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