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Are the rays parallel after they come out of the prism?

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  1. May 19, 2016 #1
    1. The problem statement, all variables and given/known data
    Two rays of light fall on a surface of the prism. Do they remain parallel after they come out from the prism?

    2. Relevant equations
    sina/sinb=n2/n1

    3. The attempt at a solution
    I think they do, as the incidence angles are equal, the refraction angles are equal they become incidence angles which are still equal and will have equal refraction angles.
     
  2. jcsd
  3. May 19, 2016 #2

    blue_leaf77

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    They will remain parallel only if they have the same wavelengths.
     
  4. May 19, 2016 #3
    We are studying at the light just in the geometrical aspect. Can you give me a hist to solve it basing on it?
     
  5. May 19, 2016 #4

    blue_leaf77

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    Then I guess the lecture currently still assume monochromatic (single wavelength) case and of course your answer should be correct.
     
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