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← ScienceWhich outcome occurs when imperfections cause non-uniform layer thickness in anti-reflective lens coatings?
A)Destructive interference across varied wavelengths✓
B)Increased refractive index at defect site
C)Polarization shift around the defect
D)Enhanced constructive interference uniformly
💡 Explanation
Non-uniform thickness causes variations in the phase change upon reflection, leading to destructive interference within slightly different wavelength ranges, because the path difference varies. Therefore, some colours are selectively enhanced, rather than uniform cancellation.
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