Abstract
From tracking the movement of celestial bodies to mechanical clocks and now prevalent atomic clocks, timekeeping has been one of the greatest quests for finding stable and better oscillators. Measurement of transition frequency between two designated levels of an atom forms the basis of atomic clocks. Time is derived from the measurement of frequency and that is the reason that atomic clocks are more appropriately called atomic frequency standards. Since the realization of first atomic frequency standard based on cesium in 1955, the field of precision time and frequency metrology has been revolutionized. Along with the evolution of timekeeping, a detailed description of various types of atomic frequency standards, applications, and the roadmap toward redefinition of SI second is presented in this chapter.KeywordsTimekeepingAtomic ClocksCesium fountainOptical clocks
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
