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Anyone remember how to prove Babinet's principle through superposition? (diffraction)

  1. May 21, 2003 #1
    Yo, d00dz

    I'm kind of stumped on this problem on my homework: "A monochromatic beam of parallel light is incident on a hole of diameter a >> wavelength. Point P lies in the geometrical shadow region on a distant screen. Two obstacles are placed in turn over the hole. A is an opaque circle with a hole in it and B is the "photograhpic negative" of A (a circle with an opaque hole in it) Using superposition concepts, show that the intensity at P is indentical for each of the two diffracting objects A and B (Babinet's principle)"

    I'm just clueless as to where to start on this.. I was about to fire up a point-by-point analysis, but this class doesn't really require knowledge of integration, so I don't think that's the right way to go about finding the answer

    Can anyone lend a hand?

    I'm going to stay up for a while seeing if I can't help anyone else on their homework, and then I'll get up in the morning early, in case any people in other time zones show up
  2. jcsd
  3. May 21, 2003 #2

    Tom Mattson

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