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Diffraction Grating Video (QED)

  1. Aug 5, 2009 #1
    I was just looking through Feynman's QED book (i'm surprised I'd never read it before) and I was wondering if anyone knew of any videos out there that actually experimentally demonstrate how light can be reflected by a diffraction grating even when the incident laser isn't actually POINTING at the grating. Or perhaps something similar where a small mirror is placed on top of a diffraction grating and a laser pointed at the mirror only and yet diffraction effects can be seen. Any links would be greatly appreciated.

    P.S. I'm looking for a real video, not CGI animations.
  2. jcsd
  3. Aug 10, 2009 #2
  4. Aug 10, 2009 #3
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