PURPOSE: To show the transition from one slit to multiple slits and the diffraction grating.
DESCRIPTION: A slide contains an array of 1, 2, 3, 4, and 5 slits. The single and double slit patterns are familiar. For N slits, where N is 3 or more, N-2 maxima of lesser intensity appear between the primary maxima. As N increases, the prim ary maxima increase in intensity as the 1st, 2nd, 3rd, 4th,etc. order spots, and these lesser maxima decrease in intensity until they cease to exist for a grating.
SUGGESTIONS:
EQUIPMENT: Laser cart with multiple slit slide.
SETUP TIME: None.
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