Mirage or have you seen mirage which is an illusion of water on a hot road or desert. Explain

Explanation

(i) A mirage is observed on a hot day in the desert or road.
(ii) The air near the hot road or desert surface is hot and hence rarer than the air above.
(iii) As height increases, the refractive index also increases.
(iv) The direction of light rays keeps changing due to refraction and appears to be coming from the image of the object on the ground.
(v) This is called a mirage.