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Which outcome occurs when multilayer dielectric mirrors experience water condensation?

A)Decreased destructive interference bandwidth
B)Increased specular reflection angle
C)Increased substrate thermal conduction
D)Decreased thin film mechanical stress

💡 Explanation

Water condensation introduces refractive index variations into the structure; therefore, decreased destructive interference bandwidth occurs which degrades reflectance, because the intended Fabry-Pérot mechanism is disrupted rather than increasing reflection angles.

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