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Radiation - Wikipedia In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or a material medium [1][2] This includes: Radiation is often categorized as either ionizing or non-ionizing depending on the energy of the radiated particles
Radiation | Definition, Types, Effects, Facts | Britannica All matter is constantly bombarded with radiation of both types from cosmic and terrestrial sources This article delineates the properties and behaviour of radiation and the matter with which it interacts and describes how energy is transferred from radiation to its surroundings
Radiation Basics | US EPA Radiation is energy It can come from unstable atoms that undergo radioactive decay, or it can be produced by machines Radiation travels from its source in the form of energy waves or energized particles There are different forms of radiation and they have different properties and effects
What is Radiation? | IAEA Radiation is energy that moves from one place to another in a form that can be described as waves or particles We are exposed to radiation in our everyday life Some of the most familiar sources of radiation include the sun, microwave ovens in our kitchens and the radios we listen to in our cars
Radiation Basics | NRC. gov Radiation is energy given off by matter in the form of rays or high-speed particles All matter is composed of atoms Atoms are made up of various parts; the nucleus contains minute particles called protons and neutrons, and the atom's outer shell contains other particles called electrons