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Which outcome results when thin-film interference in high humidity?

A)Film refractive index shifts slightly
B)Increased polymer chain entanglement occurs
C)Substrate lattice parameters abruptly change
D)Delocalized electron concentration increases rapidly

💡 Explanation

The refractive index shifts because water molecule absorption drives **constructive interference** wavelength dependency; therefore altered reflectance occurs, rather than structural polymer change effects which are long timescale, driven by temperature gradients.

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