This video (also embedded below) is pretty neat. I find it amazing that at just 7 slits, we get regularly spaced spots — almost what one would get from a diffraction grating with many slits.
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This video, on the other hand, shows interference patterns that arise when light goes through objects such as a comb, a spring, two combs, etc. Three is no accompanying commentary, though! But the results are mesmerizing.
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T.A. Abinandanan 