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oscillating maser

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  • Astrophysical maser — An astrophysical maser is a naturally occurring source of stimulated spectral line emission, typically in the microwave portion of the electromagnetic spectrum. This emission may arise in molecular clouds, comets, planetary atmospheres, stellar… …   Wikipedia

  • 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

  • Jaynes-Cummings model — The Jaynes Cummings model (JCM) is a theoretical model in quantum optics. It describes the system of a two level atom interacting with a quantized mode of an optical cavity, with or without the presence of light. The JCM is of great interest in… …   Wikipedia

  • Norman Foster Ramsey — (* 27. August 1915 in Washington, D.C.) ist ein US amerikanischer Physiker. 1989 erhielt er den Physik Nobelpreis für seine Arbeiten, die zu verbesserten spektroskopischen Verfahren in der Atom , Molekül und Kernphysik und zu präzisen Zeit und… …   Deutsch Wikipedia

  • Pentagrid converter — For other types of frequency converters please, see Frequency converter. The pentagrid converter is a radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio receiver. Grids of a 12SA7GT… …   Wikipedia

  • Norman Ramsey — Norman Foster Ramsey (* 27. August 1915 in Washington, D. C.; † 4. November 2011 in Wayland, Middlesex County, Massachusetts[1]) war ein US amerikanischer Physiker. 1989 erhielt er den Physik Nobelpreis für seine Arbeiten, die zu verbesserten… …   Deutsch Wikipedia

  • Cavity magnetron — Magnetron with section removed (magnet is not shown) …   Wikipedia

  • Crystal oscillator — A miniature 4 MHz quartz crystal enclosed in a hermetically sealed HC 49/US package, used as the resonator in a crystal oscillator. A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal …   Wikipedia

  • 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

  • Light — For other uses, see Light (disambiguation). Visible light redirects here. For other uses, see Visible light (disambiguation) …   Wikipedia

  • Supernova — This article is about the astronomical event. For other uses, see Supernova (disambiguation). Multiwavelength X ray, infrared, and optical compilation image of Kepler s supernova remnant, SN 1604. A supernova is a stellar explosion that is more… …   Wikipedia

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