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A beaker with a mirrored bottom is filled with a liquid whose index of refraction is...

A beaker with a mirrored bottom is filled with a liquid whose index of refraction is 1.69. A light beam strikes the top surface of the liquid at an angle of 41.5 ∘ from the normal.

Part A: At what angle from the normal will the beam exit from the liquid after traveling down through it, reflecting from the mirrored bottom, and returning to the surface?

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