A layer of oil n 145 floats on an unknown liquid a ray of, Ask an Expert

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A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light originates in the oil and passes into the unknown liquid. The angle of incidence is 65.4 degrees, and the angle of refraction is 59.7 degrees. What is the index of refraction of the unknown liquid?

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