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 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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