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Double-slit interference

  1. Apr 21, 2009 #1
    1. The problem statement, all variables and given/known data
    I was just wondering in double-slit interference, when it's a bright fringe, let's say m=2, does that mean that one wave coming from one of the slits is travelling 2 wavelengths longer than than the other wavelength coming from the other slit? How does that work?
    Thanks


    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Apr 23, 2009 #2

    Redbelly98

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    Yes, that's exactly what it means.

    It works because the waves coming out of the slit travel at some angle, so that one of the paths is longer. See the figure here:
    http://commons.wikimedia.org/wiki/File:Double_Slit_Experiment.png

    Hope that helps?
     
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