visible radiation
71Photosynthetically active radiation — The expression Photosynthetically Active Radiation, often abbreviated PAR, designates the spectral range of solar light from 400 to 700 nanometers that is useful to terrestrial plants in the process of photosynthesis. This spectral region… …
72electromagnetic radiation — noun Physics a kind of radiation including visible light, radio waves, gamma rays, and X rays, in which electric and magnetic fields vary simultaneously …
73electromagnetic radiation — electromagnet′ic radia′tion n. phs radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays • Etymology: 1950–55 …
74thermal radiation — /θɜməl reɪdiˈeɪʃən/ (say thermuhl raydee ayshuhn) noun 1. electromagnetic radiations emitted from a heat or light source as a consequence of its temperature; it consists essentially of ultraviolet, visible and infra red radiation. 2. the heat and …
75thermal radiation — 1. The heat and light produced by a nuclear explosion. 2. (DOD only) Electromagnetic radiations emitted from a heat or light source as a consequence of its temperature; it consists essentially of ultraviolet, visible, and infrared radiations …
76видимое излучение — [visible radiation] излучение (1.), воспринимаемое глазом, т.е. в диапазоне X = 0,4 0,8 мкм; Смотри также: Излучение эффективное излучение тепловое излучение собственное излучение …
77spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
78Infrared — For other uses, see Infrared (disambiguation). An image of two people in mid infrared ( thermal ) light (false color) …
79nebula — nebular, adj. /neb yeuh leuh/, n., pl. nebulae / lee , luy /, nebulas. 1. Astron. a. Also called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula …
80star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …
