Question

Revanth blew air from his mouth onto the mirror while he was getting ready to go to school. He observed that the image in the mirror was not clear. why do you think it has become so ?

Answer 1

The blown air from the mouth of Revanth comprises of moisture in the form of water vapors.

When we tend to blow the air on the surface of the mirror which is considered to be cooler comprises of vapors to cool down & hence the cloudy surface is created.

With time the cooled vapors gets evaporated then the room temperature is sufficient enough to easily evaporate and hence completely disappear.