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A soap lm (nf = 1:33) is 465 nm thick and lies on a glass plate (ng = 1:52). Sunlight, whose visible wavelengths (in vacuum) extend from 380 nm to 750 nm, travels through air and strikes the lm perpendicularly. For which wavelenght(s) of visible light does destructive interference of light result in the absence of this/these color(s) in light reflected from the film?

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