50. (II) A micrometer is connected to the movable mirror
Chapter 24, Problem 50(choose chapter or problem)
50. (II) A micrometer is connected to the movable mirror of an interferometer. When the micrometer is tightened down on a thin metal foil, the net number of bright fringes that move, compared to the empty micrometer, is 272. What is the thickness of the foil? The wavelength of light used is 589 nm.
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