(electromagnetic) radiation
41Electromagnetic pulse — Ebomb redirects here. For EBOM, see Engineering bill of materials. This article is about the general weapons effect. For other uses, see the more specific topic (for example, Electromagnetic forming) An electromagnetic pulse (sometimes… …
42Electromagnetic spectrum — The electromagnetic (EM) spectrum is the range of all possible electromagnetic radiation frequencies. [cite web|url=http://imagine.gsfc.nasa.gov/docs/dict ei.html#em spectrum|title=Imagine the Universe! Dictionary] The electromagnetic spectrum… …
43Electromagnetic field — The electromagnetic field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field.The electromagnetic field extends indefinitely throughout space and describes the… …
44radiation measurement — ▪ technology Introduction technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement. The term ionizing radiation refers to those… …
45electromagnetic wave — noun radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge • Syn: ↑electromagnetic radiation, ↑nonparticulate radiation • Hypernyms: ↑radiation • Hyponyms:… …
46Electromagnetic interference — RIV redirects here. For other uses, see RIV (disambiguation). Electromagnetic interference in analog TV signal Electromagnetic interference (or EMI, also called radio frequency interference or RFI) is disturbance that affects an electrical… …
47Electromagnetic wave equation — The electromagnetic wave equation is a second order partial differential equation that describes the propagation of electromagnetic waves through a medium or in a vacuum. The homogeneous form of the equation, written in terms of either the… …
48Radiation pattern — Three dimensional antenna radiation patterns. The radial distance from the origin in any direction represents the strength of radiation emitted in that direction. The top shows the directive pattern of a horn antenna, the bottom shows the… …
49radiation pressure — Physics. the pressure exerted on a surface by electromagnetic radiation or by sound waves. [1900 05] * * * Pressure on a surface resulting from electromagnetic radiation that impinges on it. The pressure is a result of the momentum carried by the …
50radiation — 1. The act or condition of diverging in all directions from a center. 2. The sending forth of light, short radio waves, ultraviolet or x rays, or any other rays for treatment or diagnosis or for other purpose. Cf.:irradiation (2). 3. SYN:… …
