Radiometer

From Free net encyclopedia

A Radiometer is a device used to measure the radiant flux or power in Electromagnetic radiation. Although the term is perhaps most generally applied to a device which measures infrared radiation, it can also be applied to detectors operating any wavelength in the Electromagnetic spectrum.

The radiation detector within a radiometer is most often a bolometer which aborbs the radiation falling on it and as a result rises in temperature which can be measured by a thermometer of some type. This temperature rise can be related to the power in the incident radiation.

An early detector of infrared and visible radiation (light) was the Crookes radiometer.de:Radiometer fr:Radiomètre fi:Radiometri