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A boy observes a piece of stone at the bottom of a river 6.0m deep....

A boy observes a piece of stone at the bottom of a river 6.0m deep. If he looks from the surface of the river, what is the apparent distance of the stone from him? [Refractive index fwater = 4/31 A. 4.5 m. B. 5.0 m. C. 5.5 m. D. 8.0 m. [2000/19]?

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