Write short notes on
Infra red waves

Explanation

Infrared waves: These waves have the wavelength range from `7 xx 10^(-7) m " to " 7 xx 10^(-4)m`. These waves are produced by the hot bodies and also known as the heat waves. Infrared lamps are used in physical therapy. These rays from the sun keep the earth warm. These rays are used in the remote switches of household systems.