The emission or transmission of Energy in the form of Waves through space or through a material medium; the term also applies to the
radiated energy itself. The term includes Electromagnetic Radiation, Acoustics, and particle radiation, and all forms of Ionizing radiation. According to Quantum Theory, Electrogagnetic Radiation may be viewed as made up of Photon(s). Acoustic radiation is propagated as Sound waves. Examples of particle radiation are alpha and beta rays in Radioactivity, and Cosmic Rays.