Features:

Electromagnetic radiometer Electromagnetic wave (also named electromagnetic radiation) which is through the synchronism vibration,and the electric field and the magnetic field that are mutually perpendicular move in the space in the form of wave, its propagation direction are vertical to the plane constituted by electric field and the magnetic field, effectively transmit energy and momentum. The electromagnetic radiations may classified by frequency, from low frequency to high-frequency, including radio wave, microwave, infrared, visible light, ultraviolet ray, X- beam and Gamma ray and so on.

(Julie)