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A uniform thin film of alcohol (n = 1.36) lies on a flat glass plate (n...

A uniform thin film of alcohol (n = 1.36) lies on a flat glass plate (n = 1.56). When monochromatic light, whose wavelength can be changed, is incident normally, the reflected light is a minimum for λ = 488nm and a maximum for λ = 610nm.

What is the minimum thickness of the film?

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