Radiation

For other uses, see Radiation (disambiguation). Radiation in physics is a process of emission of energy in the form of waves or particles. Various types of radiation may be distinguished, depending on the properties of the emitted energy/matter, the type of the emission source, properties and purposes of the emission, etc. Radiation by type of emission Electromagnetic radiation, a stream of photons. Gamma radiation, which is high-energy electromagnetic waves. Gravitational radiat ...