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During a boring banquet you notice that the fat swimming on top of your soup is...


During a boring banquet you notice that the fat swimming on top of your soup is reflecting back cyan, which you remember to be about 500 nm in wavelength. Carefully observing the refraction angles of your submerged spoon, you figure out that the index of refraction of the soup is 1.36, while the index of refraction of the fat is 1.43. What is the smallest possible thickness of the fat layer on top of your soup?

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