Diffraction Videos (i.e., Diffraction videos):
1. Interference-interferencia | 0:18: Interference in a ripple tank. Interference and diffraction are essentially the same thing. Interference is when the sources are few; diffraction is when the sources are may or there are a continuum of sources. The words are often used as synonyms The video looks a bit like an animation, but yours truly thinks it's real. Short enough for the classroom. Show it.
2. Ripple Tank Two Slit Interference | 0:10: Not bad. You see the contructive and destructive fringes. Too short for the classroom.
3. Young's Double Slit Experiment | 1:09: Well Jack Maxwell (the great, great, great grandson of Jim Maxwell) never uses slits, but it's still pretty nifty what you can do with laser pointer and some pencil leads (i.e., graphite cores). See Wikipedia: Young's interference experiment for the real Young's interference experiment. Actually rather than using slits, Jack M is relying on Babinet's principle to substitute for slits. Note Babinet's principle: "the diffraction pattern from an opaque body is identical to that from a hole of the same size and shape except for the overall forward beam intensity" (see Wikipedia: Babinet's principle). Very good for the classroom. Show it.
4. Diffraction of Light | 2:17: A pseudo tutorial. Too long for the classroom.
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