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radiation, flow of atomic and subatomic particles and of waves, such as those that characterize heat rays, light rays, and X rays. 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 ...
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: electromagnetic radiation consisting of photons, such as radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma radiation (γ) particle radiation consisting of ...
Particle Radiation: such as alpha radiation (α), beta radiation (β), and neutron radiation. Gravitational Radiation: such as radiation that takes the form of gravitational waves, or ripples in the curvature of space-time. Acoustic Radiation: such as ultrasound, sound, and seismic waves. Electromagnetic radiation: such as radio waves, visible ...
The space between the Earth and the Sun is largely empty, without any possibility of heat transfer by convection or conduction. In these examples, heat is transferred by radiation. That is, the hot body emits electromagnetic waves that are absorbed by our skin: no medium is required for electromagnetic waves to propagate.
Apr 16, 2024 · Key Takeaways. Radiation is the emission and transmission of energy in the form of electromagnetic waves or particles. Radiation can be ionizing or nonionizing radiation, and only ionizing radiation has enough energy to potentially cause damage to cells and DNA.
Jan 25, 2023 · Ionizing radiation is a type of radiation of such energy that it can detach electrons from atoms or molecules, which causes changes at the atomic level when interacting with matter including living organisms. Such changes usually involve the production of ions (electrically charged atoms or molecules) – hence the term “ionizing” radiation.
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Dec 8, 2019 · Radiation is the release of energy, whether it takes the form of waves or particles. Radioactivity refers to the decay or splitting of an atomic nucleus. A radioactive material releases radiation when it decays. Examples of decay include alpha decay, beta decay, gamma decay, neutron release, and spontaneous fission.