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A soap film (n = 1.33) is 498 nm thick and lies on a glass plate...

A soap film (n = 1.33) is 498 nm thick and lies on a glass plate (n = 1.52). Sunlight, whose wavelengths (in vacuum) extend from 380 to 750 nm, travels through the air and strikes the film perpendicularly. For which wavelength(s) in this range does destructive interference cause the film to look dark in reflected light? To 3 significant figures

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phase change II due to denser medium reflechon ni1 t=498 nm N₂ = 1.33 phase changed nes 3= 1.52 path diffrence blw 1 and ② at

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