Caesium_standard Caesium_standard

Caesium standard - Definition and Overview

Related Words: Dannebrog, Zeitgeist, Antitype, Archetype, Assay, Assize, Authentic, Average, Axiology

In telecommunication, a caesium standard is a primary frequency standard in which electronic transitions between the two hyperfine ground states of caesium-133 atoms is used to control the output frequency.

Note: The energy level between the two hyperfine ground states corresponds, in the absence of external influences (e.g., the Earth's magnetic field), to a frequency of 9,192,631,770 Hz.

Source: from Federal Standard 1037C and from MIL-STD-188

Example Usage of standard

SportsBash: @gibsonlifestyle Say Hello to the Angus Young SG standard http://bit.ly/4lN9iL
Balls_On_Chin: Xbox Live: ballzonchinftw is currently Online. Playing UNO. standard - Multiplayer Round 3 Score 17/250. (Xbox Live Nation)
ECHSKeyClub: BREAKING NEWS UPDATE: Our site should return arond 2AM Eastern standard time tonight. Sorry for any inconviece and... http://fb.me/32vdMIR
Copyright 2009 WordIQ.com - Privacy Policy  :: Terms of Use  :: Contact Us  :: About Us
This article is licensed under the GNU Free Documentation License. It uses material from the this Wikipedia article.