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Light of wavelength 425.0 nm in air falls at normal incidence on an oil film that is 850.0 nm thick. The oil is floating on a water layer 1500 nm thick. The refractive index of water is 1.33, and that of the oil is 1.40. The number of wavelengths of light that fit in the oil film is closest to:
Answers: 3
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Light of wavelength 425.0 nm in air falls at normal incidence on an oil film that is 850.0 nm thick....
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