Infrared radiation is part of the electromagnetic spectrum
A perfect black body is an object absorbing all the radiation hitting it. No radiation is reflected or transmitted. They are good emitters and absorbers. Radiation emitted by a perfect black body is called black body radiation.
The hotter the object is, the more infrared radiation is emitted
When an object absorbs radiation faster than it emits it, the temperature increases.
If there was no atmosphere, the surface would not be receiving any radiation from the Sun - it would be emitting radiation into space.
Greenhouse gases absorb longer wavelength infrared from the Earth and prevent its escape into space. They absorb radiation and emit it back to the surface.
Comments
No comments have yet been made