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← ScienceWhich outcome results when reflective coating thickness varies?
A)Iridescence due to thin-film interference✓
B)Increased specular reflection coefficient
C)Reduced surface plasmon resonance frequency
D)Enhanced thermal emission spectrum shift
💡 Explanation
Iridescence occurs because varying coating thickness causes different wavelengths to constructively interfere via thin-film interference principles. Therefore, a range of colors is visible, rather than enhanced reflection which would require uniform thickness and material properties.
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