MASER — Le mot «maser» (Microwave Amplification by Stimulated Emission of Radiation ) signifie amplification de micro ondes par émission induite de rayonnement. Les masers présentent un très grand intérêt historique. Celui à ammoniac, réalisé par Charles … Encyclopédie Universelle
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
laser — /lay zeuhr/, n. Physics. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase. Also called optical maser. [1955 60; … Universalium
Mechanoid (GaoGaiGar) — In the anime and manga series The King of Braves GaoGaiGar and The King of Braves GaoGaiGar FINAL, a Mechanoid is the result of a performed synchronization (or Fusion ) between a natural or semi artificial life form (such as a Cyborg) and an… … Wikipedia
HYPERFRÉQUENCES — D’après la définition la plus couramment admise, les hyperfréquences représentent des ondes électromagnétiques dont la longueur d’onde est de l’ordre du centimètre, et que l’on utilise notamment en technique radar et en transmission hertzienne.… … Encyclopédie Universelle
List of Russian people — The Millennium of Russia monument in Veliky Novgorod, featuring the statues and reliefs of the most celebrated people in the first 1000 years of Russian history … Wikipedia
Microwave — This article is about the electromagnetic wave. For the cooking appliance, see Microwave oven. For other uses, see Microwaves (disambiguation). A microwave telecommunications tower on Wrights Hill in Wellington, New Zealand Microwaves, a subset… … Wikipedia
Charles Hard Townes — Born July 28, 1915 (1915 07 28) (age 96) Greenville South Carolina Residence Unit … Wikipedia
Cosmic distance ladder — * Light green boxes: Technique applicable to star forming galaxies. * Light blue boxes: Technique applicable to Population II galaxies. * Light Purple boxes: Geometric distance technique. * Light Red box: The planetary nebula luminosity function… … Wikipedia
telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… … Universalium
Nobel Prize winners by name — ▪ Table Nobel Prize winners by name A B C D E F G H I J K L M N O P Q R S T U V W Y Z A name year category country* achievement literary area Abrikosov, Alexey A. 2003 physics U.S. discoveries… … Universalium