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How to find intensity in double slit

  1. Nov 22, 2008 #1
    1. The problem statement, all variables and given/known data
    the two slit of a double slit each have a width of 0.140mm and a distance between centers of 0.840mm. what the approximate intensity of orders m=o to m=6?

    2. Relevant equations
    i want to use the I/Io = (E/Eo)^2 but some book use
    I = 4Ao^2sin^2 beta/beta^2cos^2gamma. i also dont know how to find the value for beta and gamma.

    anybody please help me......

    3. The attempt at a solution
  2. jcsd
  3. Nov 23, 2008 #2

    Chi Meson

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    Science Advisor
    Homework Helper

    I'm sorry, I even went to my old 3rd Year Optics textbook, and I cannot find the method for answering this problem. Try reposting this in the "Advanced" forum.
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