Cool Light Radiation 2023. Web when an electromagnetic wave is absorbed by an object, the wave exerts a pressure (p) on the object that equals the wave’s irradiance (i) divided by the speed of light (c): This article delineates the properties and behaviour of radiation.

All matter is constantly bombarded with radiation of both types from cosmic and terrestrial sources. More broadly, physicists use the term light to mean electromagnetic radiation of all wavelengths, whether visible or not. So the color we see is the light that is reflected.