A fish is looking at a $1.0 m$ high plant of the edge of the pond. Will the plant appear shorter or taller than its actual height, to the fish

taller

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shorter

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no change

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Solution

The correct option is A taller
When light from the top of the plant strikes air-water surface it refracts and bends towards the normal and strikes the fish. To the fish the refracted ray is the one appearing to travel from the top of the plant and not the incident ray. When the refracted ray is extended backwards along a straight line, such that it was the original incident ray that didn't undergo refraction, it intersects at a point higher than the actual top of the plant. Hence, the plant appears taller.

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A fish is looking at a 1.0m high plant of the edge of the pond. Will the plant appear shorter or taller than its actual height, to the fish

A fish is looking at a $1.0 m$ high plant of the edge of the pond. Will the plant appear shorter or taller than its actual height, to the fish