What is the effect of hot air distortion in weather?

The distortion of hot air in weather is the refraction effect of light. When the weather is very hot, because the temperature of the earth's surface is very high, the air in contact with the earth's surface is also heated. The density of the air with high temperature and the air with low temperature is different. The light rays travel from the optically sparse medium to the optically dense medium. refraction occurs.

Since the density of air is gradually changing, the light appears to us to be distorted