Question

why a coin placed in water vapour appears to be raised​

Answer 1

Answer:

the ray of light from the coin travels from a denser medium to a rarer medium . In this process it bends away from the normal . The point from which the refracted rays appear to come gives the apparent position of the coin. As the rays appear to come from a point above the coin, so, the coin seems to be raised.

Answer 2

Answer:

becoz its dirt gets removed

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