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Which degradation results as a consequence of thin-film interference within multi-layer optical coatings?

A)Increased broadband reflective losses
B)Overall enhanced transmission spectra
C)Improvement in spectral contrast ratio
D)Elimination of chromatic focal shifts

💡 Explanation

Increased reflection occurs because constructive and destructive thin-film interference modifies reflection at interfaces; therefore reflected amplitude increases, rather than enhanced transmission, altered spectral contrast, or eliminating chromatic shift which arises from dispersion.

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