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← ScienceWhich consequence results when thin film thickness varies?
A)Iridescence due to optical interference✓
B)Increased chromatic aberration effects
C)Wavelength shift and signal enhancement
D)Polarization shifts during optical transition
💡 Explanation
Iridescence arises due to constructive and destructive interference as film thickness changes; creating varied reflected wavelengths, because different colored light constructively interferes at certain thicknesses. Therefore, iridescence is seen rather than uniform reflection and monochromatic light.
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