Define refraction of the light with the help of suitable diagram. Give the reason, why a pencil appears bent in
the glass full of water.
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Explanation:
Refraction is the bending of a wave when it passes from one medium to another. The bending is caused due to the differences in density between the two substances.
Hence, we can define
Refraction is the change in the direction of a wave passing from one medium to another.
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