Infrared radiation is the wavelength of light from 700 nm – 1 mm in the spectrum. The wavelength of infrared radiation is slightly larger than the visible wavelength of light. However, it cannot be seen with the naked eye. This heat is radiated from the sun, wood fires, electric stoves.

Uses of Infrared radiation

1. To cure muscle pain,
2. To take pictures in the dark,
3. To forecast the weather,
4. Treatment of skin and arthritis, and
5. In industrial factories.