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← ScienceWhich outcome occurs when a thin oil film rests on water?
A)Iridescence produced from thin-film interference✓
B)Substrate cooling due to enthalpy absorption
C)Fluid convection from temperature gradients
D)Refraction mitigated via index matching
💡 Explanation
Iridescence results because constructive and destructive thin-film interference varies with wavelength, therefore colors appear, rather than a uniform reflection. Interference patterns depend on thickness and refractive indices.
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