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If you desire to shoot a fish whose image can be seen in clear water, should...

If you desire to shoot a fish whose image can be seen in clear water, should you aim above or below the fish? explain by the aid of a diagram.

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Answer #1

The fish is originally at point A. As the ray of light is travelling from the fish to us above, it bends at the boundary separating air and water due to refraction. When the ray reaching us is extrapolated back, it appears to be coming from another point B in the water. Therefore, to us the fish appears to be at point B. Point B is slightly above point A(original location of fish). Therefore to shoot the fish correctly, we have to aim below the fish we see.

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