Chem & Physics Quiz
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A thin oil film forms on a wet roadway after rain. White light is incident nearly normally from air (na=1.00) onto the oil (no=1.45) floating on water (nw=1.33). The film thickness is approximately uniform over a small region. Assume negligible absorption and that a π phase shift occurs upon reflection from a boundary to a higher refractive index.
Which statement best predicts the reflected color behavior as the oil film thickness gradually increases at that region?
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