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Fresnel diffraction; geometrical shadow

  1. Jan 31, 2008 #1
    What is geometrical shadow qualitatively? please dont refer me to hyper physics
  2. jcsd
  3. Jan 31, 2008 #2

    Claude Bile

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    A geometric shadow is a set of points (or a region of space) where drawing a line between said points and a source always results in the line intersecting some obstacle.

    A looser explanation would be that a geometric shadow is the shadow objects would possess in the absence of diffraction.

  4. Jan 31, 2008 #3
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