Question

A pencil practically emerged in the water appears to be band at water surface .Explain it with the help of label diagram state wheather will be bending of pencil will increase or decrease

Answer 1

When a pencil is obliquely dipped in water , the ray of light travelling from pencil to observer travel from denser medium to rarer medium & hence bend away from normal . In this way ,  every point of the dipped part of pencil has a virtual image slightly above the original position . So the pencil appears to be bent / broken at surface of water.

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Answer 2

A pencil dipped in a glass of water appears to be bent because of refraction of light. When light passes from an optically rarer to denser medium, it bends towards the normal and when light passes through from an optically denser to rarer medium, it bends away from the normal.
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