Question: A thin - film can display a diffraction pattern if light reflecting off the top layer interferes with light reflecting off the bottom layer. For

A thin

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film can display a diffraction pattern if light reflecting off the top layer interferes with light reflecting off the bottom layer. For constructive interference, the phase of these two light waves must differ by: an odd one

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third

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integer number of wavelengths. any quarter

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integer number of wavelengths. a whole integer number of wavelengths. an odd half

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integer number of wavelengths. none of the above.

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