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Which consequence results when imperfections reduce coating uniformity in multilayer optical films?

A)Increased destructive interference at design wavelengths
B)Enhanced thin-film compressive stress
C)Reduced thermal expansion coefficient
D)Higher refractive index homogeneity

💡 Explanation

Increased imperfections cause deviations in layer thickness; the **optical path difference** varies across the film because random variations disrupt the intended interference. Destructive interference is enhanced therefore, rather than constructive modes, because phase relationships are scattered randomly.

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