I already know the answer to this practice problem, and it is shown is the image. I do not know how to get to the answer though, so seeing the steps and equations would be much appreciated. A uniform film of oil (n = 1.31) is floating on water. When sunlight in air is incident normally on the film, an observer finds that the reflected light has a brightness maximum at 1 = 450 nm and abrightness minimum at 2= 600 nm. What is the thickness of the oil film?ANS:343.5 nm

Basic Details The uniform oil film floating on the water, the reflected light forms brightness…

Answered: A uniform film of oil (n = 1.31) is…

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A uniform film of oil (n = 1.31) is floating on water. When sunlight in air is incident normally on the film, an observer finds that the reflected light has a brightness maximum at 1 = 450 nm and a brightness minimum at 2= 600 nm. What is the thickness of the oil film? ANS: 343.5 nm