maser frequency
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maser — ☆ maser [mā′zər ] n. [m(icrowave) a(mplification by) s(timulated) e(mission of) r(adiation)] a device, operating at microwave frequencies, in which atoms or molecules are raised to a higher energy level and allowed to lose the energy by radiation … English World dictionary
Maser — For other uses, see Maser (disambiguation). A hydrogen radio frequency discharge, the first element inside a hydrogen maser (see description below) A maser is a device that produces coherent electromagnetic waves through amplification by… … Wikipedia
maser — /may zeuhr/, n. a device for amplifying electromagnetic waves by stimulated emission of radiation. Cf. laser. [1950 55; m(icrowave) a(mplification by) s(timulated) e(mission of) r(adiation)] * * * Device that produces and amplifies… … Universalium
Frequency standard — A frequency standard is a stable oscillator used for frequency calibration or reference. A frequency standard generates a fundamental frequency with a high degree of accuracy and precision. Harmonics of this fundamental frequency are used to… … Wikipedia
maser — noun /ˈmeɪzɚ/ a) a device for the coherent amplification or generation of electromagnetic radiation (especially of microwave frequency) by the use of excitation energy in resonant atomic or molecular systems … Wiktionary
Hydrogen maser — A Hydrogen maser, also known as hydrogen frequency standard, is a specific type of maser that uses the intrinsic properties of the hydrogen atom to serve as a precision frequency reference.Both the proton and electron of a hydrogen atom have… … Wikipedia
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
Wasserstoff-Maser-Uhr — Wasserstoff Maser Ein Wasserstoff Maser oder Wasserstoff Frequenznormal ist ein spezieller Maser Typ, der die spezifischen Eigenschaften des Wasserstoff Atoms verwendet, um als hochgenaue Frequenz Referenz zu dienen. Sowohl das Proton als auch… … Deutsch Wikipedia
Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… … 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
Einweg-Lichtgeschwindigkeit — Die Einweg Lichtgeschwindigkeit ist die Geschwindigkeit, mit welcher ein Lichtsignal von einem Sender zu einem Empfänger (und nicht wieder zurück) geschickt wird. Die Konstanz der Einweg Lichtgeschwindigkeit in jedem Inertialsystem ist eine… … Deutsch Wikipedia
