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Solution: A ray of light traveling in a block of glass (n = 1.52) is i...

Question

A ray of light traveling in a block of glass (n = 1.52) is incident on the top surface of the block at an angle of 62.8° with respect to the normal. If a layer of oil is placed on the top surface of the glass, the ray is totally reflected. What is the maximum possible index of refraction of the oil?