Determine the minimum thickness of the film

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Reference no: EM13502138

A thin film of alcohol (n=1.36) lies on a flat glass plate (n=1.51). When monochromatic light, whose wavelength can be changed, is incident normally, the reflected light is a minimum for ?=512 nm and a maximum for ?=640 nm. What is the minimum thickness of the film?

Reference no: EM13502138

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