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Coherence light

  1. May 22, 2008 #1
    1. The problem statement, all variables and given/known data

    light is incident on an equilateral triangular prism (n=1.55) at a 35 degree angle from the normal to one of the faces. What is the exit angle?


    2. Relevant equations




    3. The attempt at a solution

    45 degree
     
    Last edited: May 22, 2008
  2. jcsd
  3. May 23, 2008 #2
    This isn't a coherence question (or advanced physics) but here goes -
    You haven't shown any of your work, so lets break this down and go from the beginning - you should know that the beam of light bends as it passes through the first surface of the prism - you should know of a law that describes how much bending occurs. Then what happens to the beam of light?
     
  4. May 23, 2008 #3
    As sx70 said, you really should show your working.

    For further reference, look here:

    http://en.wikipedia.org/wiki/Snell's_law
     
  5. May 23, 2008 #4
    thanks for everyone's help.
    i really don't know where to start with this problem.
    i am really lost in this class and i have a midterm next wednesday.
     
  6. May 23, 2008 #5
    so using snell's law will help me find the exit angle?
     
  7. May 23, 2008 #6
    i got i = 73.8 degree
    ?
     
  8. May 23, 2008 #7
    73.8 degrees? Not yet. I was only looking for the angle inside the prism, then we were going to go thru and refract again at the second surface. You really need to show your work so I know what you're thinking - that's the way you get partial credit.
     
  9. May 24, 2008 #8
    Yes, it's the only law you'll need to solve this.

    How?
     
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