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Which consequence results when thin-film interference reduces photodetector quantum efficiency?

A)Increased signal-to-noise
B)Reduced detected intensity
C)Faster carrier recombination
D)Enhanced spectral bandwidth

💡 Explanation

Reduced external quantum efficiency lowers detectable light. Destractive thin-film interference minimizes light reaching a sensor because incident and reflecting waves cancel each other at certain wavelengths via destructive interference therefore the detected intensity becomes very weak, rather than amplifying signal or recombination effect.

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