Question

explain the following: a) a coin placed at the bottom of a vessel appears to be raised when water is poured in vessel b) a straight stick partly dipped in water obliquely, appears to be bent at surface of water. c) the sun is seen before the sunrise and after the sunset

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Answer 1

Answer:

1. Refraction makes the coin look raised than it actually is.

2. Refraction of light causes the light rays to bend, and hence the stick looks bent.

3. Atmospheric refraction leads to the sun rays to be visible before the sunrise in the morning, and after the sunset in the evening, as the density of the various layers of the atmosphere varies.

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