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← ScienceWhich outcome occurs when a thin-film coating on anti-reflective eyewear exhibits spatially varying thickness?
A)Iridescent color banding is observed✓
B)Uniform enhanced light transmission occurs
C)Overall refractive index is minimized
D)Polarization effects become self-canceling
💡 Explanation
Iridescent color banding is observed because variations in thickness alter the effective path difference of reflected light, undergoing thin-film interference. Therefore, different wavelengths constructively interfere at different locations, rather than uniform behavior, due to mismatched thicknesses.
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