ATOMICCLOCK

Atomic clock

An atomic clock is a clock device that uses an electronic transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element. Atomic clocks are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, to control the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS.

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atomic clock

Noun

  1. An extremely accurate reference clock whose operation is based on an atomic process, typically the frequency of electromagnetic radiation associated with a specified energy-level transition in an element such as cesium.
  2. A radio clock.


The above text is a snippet from Wiktionary: atomic clock
and as such is available under the Creative Commons Attribution/Share-Alike License.

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