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Homework Help: Snell's Law/Critical Angles Problem

  1. Jan 4, 2005 #1
    I know how to do critical angle problems, using snell's law, but i was given a circle and i'm not sure how i should go about finding the incident angle.. If someone could help me out with that it would be awesome! THX
    Nicole
     
  2. jcsd
  3. Jan 4, 2005 #2

    dextercioby

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    Post the exact text of the problem and maybe attach some drawing,since this is a problem that will use some geometry.And it's Snell-Descartes law.
    That is if u want us to help u...

    Daniel.
     
  4. Jan 5, 2005 #3

    HallsofIvy

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    If your light ray is reflecting off a circle (or cylinder), the angle is the angle made with the tangent line to the circle.
     
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