A thin film of oil (n = 1.30) floats on water (n = 1.33). When sunlight is
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A thin film of oil (n = 1.30) floats on water (n = 1.33). When sunlight is incident at right angles to this film, the only colors that are enhanced by reflection are blue (458 nm) and red (687 nm). Estimate the thickness of the oil film.
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