[Wikipedia] In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating through space, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-rays, and gamma rays. All of these waves form part of the electromagnetic spectrum.
[EnvThes] Energy transfer in the form of electromagnetic waves or particles that release energy when absorbed by an object.
Electromagnetic radiation
Gamma ray
Ultraviolet
Radiation
Solar radiation