Understudy definition, to learn (a role) in order to replace the regular actor or actress when necessary. See more.
Radiation. radiation. (Science: radiobiology) propagation of energy through space. In the context of this report, it is electromagnetic radiation (x-rays or gamma rays) or corpuscular radiation (alpha particles, electrons, protons, neutrons) capable of producing ionisation.adiation. radiation. (Science: radiobiology) propagation of energy through space. In the context of this report, it is electromagnetic radiation (x-rays or gamma rays) or corpuscular radiation (alpha particles, electrons, protons, neutrons) capable of producing ionisation.
Radiation Definition. Radiation is the emission and propagation of energy in the form of waves, rays or particles. Examples: A burning candle emits radiation in the form of heat and light. Uranium-238 decaying into Thorium-234 emits radiation in the form of alpha particles. Electrons dropping from one energy state to a lower state emit radiation in the form of a photon.