Question

A persons image when seen through a stream of hot air arising above a fire disperse to waver.explain

Answer 1

it is due to refraction of light

Answer 2

Hey there!!

We know that light changes it's speed and direction when the medium is changed.Here the 1st medium is air and 2nd one is also air but it has difference with the density ('cuz of d heat).Which is why light is refracted and the person seems wavy!

Hope it helps