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A thin oil slick (no = 1.50) floats on water(nw = 1.33). When a beam of...

A thin oil slick (no = 1.50) floats on water(nw = 1.33). When a beam of white light strikes this film at normal incidence from air, the only enhanced reflected colors are red (650 nm) and violent (390 nm). From this information, deduce the minimum thickness t of the oil slick.

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