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atomic cesium beam MASER

См. также в других словарях:

  • Atomic clock — Nuclear clock redirects here. For the clock as a measure for risk of catastrophic destruction, see Doomsday Clock. For a clock updated by radio signals (commonly but inaccurately called an atomic clock ), see Radio clock. For the album by Zion I …   Wikipedia

  • Timeline of luminiferous aether — The timeline of luminiferous aether begins in the late 19th century with the concept of luminiferous aether ( light bearing aether ), or ether, as a medium for electromagnetic propagation. The aether was assumed to exist for much of the 19th… …   Wikipedia

  • spectroscopy — 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… …   Universalium

  • electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …   Universalium

  • Time in physics — In physics, the treatment of time is a central issue. It has been treated as a question of geometry. One can measure time and treat it as a geometrical dimension, such as length, and perform mathematical operations on it. It is a scalar quantity… …   Wikipedia

  • Ramsey, Norman Foster — ▪ American scientist born Aug. 27, 1915, Washington, D.C., U.S.       American physicist who received one half of the Nobel Prize for Physics in 1989 for his development of a technique to induce atoms to shift from one specific energy level to… …   Universalium

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