Radiometry

Solar constantSolar constant

Solar constant

The solar constant is a flux density measuring mean solar electromagnetic radiation (solar irradiance) per unit area. It is measured…

6 years ago

Spectral sensitivity

Spectral sensitivity is the relative efficiency of detection, of light or other signal, as a function of the frequency or…

6 years ago

Spectral power distribution

In radiometry, photometry and color science, a spectral power distribution (SPD) measurement describes the power per unit area per unit…

6 years ago