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Homework Help: Phase Difference Problem, Ratio of I/Io

  1. Feb 9, 2007 #1
    1. The problem statement, all variables and given/known data
    What is the ratio of the intensity at this point to the intensity at the center of a bright bridge

    2. Relevant equations
    d=0.00014m (distance between slits)
    L=12m (Length to screen/point)

    I=Io cos^2(phi/2) [(Sin (B/2))/(B/2)]
    I/Io=cos^2(phi/2) [(Sin (B/2))/(B/2)]
    3. The attempt at a solution

    I have phi, solved for b/2 and plugged it in and did everything.

    I STILL GOT IT WRONG!?!?! is my equation wrong??
  2. jcsd
  3. Feb 10, 2007 #2

    Tom Mattson

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    Staff Emeritus
    Science Advisor
    Gold Member

    Where is "this point" and what's a "bright bridge"?
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