A thin film of alcohol is spread over a surface. When light from a tunable source...

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A thin film of alcohol is spread over a surface. When light from a tunable source is incident normally, the intensity of reflected light at the detector is maximum for λ = 640nm and minimum for λ=512 nm. Taking the refractive index of alcohol to be 1.36 for both the given wavelengths, the minimum thickness of the film would be nm (Round off to two decimal places). A thin film of alcohol is spread over a surface. When light from a tunable source is incident normally, the intensity of reflected light at the detector is maximum for λ = 640nm and minimum for λ=512 nm. Taking the refractive index of alcohol to be 1.36 for both the given wavelengths, the minimum thickness of the film would be nm (Round off to two decimal places).

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