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    Interference of light

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    A layer of transparent plastic (n = 1.59) on glass (n = 1.52) looks dark when viewed in reflected light whose wavelength is 570 nm in vacuum. Find the two smallest possible nonzero values for the thickness of the layer.
    answer in nanometers

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    Solution Preview

    We assume that light strikes at near normal incidence.
    For the transparent plastic to appear dark there is destructive interference
    Ray 1: ...

    Solution Summary

    The solution calculates thickness of a layer of transparent plastic using interference of light