A 250 nm-thick layer of motor oil (index 1.45) spreads over calm water (index 1.33)

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

A 250 nm-thick layer of motor oil (index 1.45) spreads over calm water (index 1.33). For near-normal incidence, calculate the visible wavelength between 400 nm and 700 nm whose reflection from the oil surface is most strongly suppressed.

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