Measuring time :frequency measurements and related developments in physics /

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"Version: 20180901"--Title page verso.Includes bibliographical references.1. Standards of physical quantities -- 1.1. Introduction -- 1.2. The time and frequency standard -- 1.3. The length standard -- 1.4. The mass standard -- 1.5. From macro to micro2. Historical role of precision measurements of time and frequency for the development of physics -- 2.1. Introduction -- 2.2. Change from Ptolemaic theory to Copernican theory -- 2.3. Measurement of the speed of light -- 2.4. Theory of relativity3. The fundamentals of an atomic clock -- 3.1. Introduction -- 3.2. Attainable accuracy of atomic clocks -- 3.3. Accuracy and stability -- 3.4. Atomic clock operating in the microwave region -- 3.5. Optical atomic clocks -- 3.6. Precision measurement of molecular transition frequencies -- 3.7. Other possible clocks -- 3.8. Comparison between atomic clocks4. The role of precision measurements in future developments in physics -- 4.1. Introduction -- 4.2. Confirmation of theory of relativity -- 4.3. Search for symmetry violations in particles and anti-particles -- 4.4. Search for the variation in the fundamental constants -- 4.5. Search for symmetry violation in chiral molecules -- 4.6. Role of atomic clocks for astronomy -- 4.7. Quantum electrodynamics and proton size5. Role of atomic clocks for human life -- 5.1. Position measurement by GPS -- 5.2. Very long baseline interferometry -- 5.3. Establishment of a national standard time and its distribution to users -- 5.4. Contribution to communication technology -- 5.5. Monitoring air composition -- 5.6. Temperature measurement -- 6. Conclusion -- Appendix A. Laser cooling.In this fascinating book Masatoshi Kajita recounts the importance of precise measurements and their inherent uncertainty, before telling the story of humankind's efforts to define and measure time with increasing accuracy, culminating in the development of atomic clocks. These improvements in the accurate measurement of time and frequency have played a pivotal role in the development of modern science; including the confirmation of Einstein's Theory of Relativity, and the recent detection of gravity waves. Furthermore, such measurements afforded by atomic clocks and other mechanisms are being used to examine key questions about the very fundamentals of our universe, the possibility of symmetry violation and even testing the idea that there may be variation of the fundamental constants themselves over time.Physicists and engineers.Also available in print.Mode of access: World Wide Web.System requirements: Adobe Acrobat Reader, EPUB reader, or Kindle reader.Born and raised in Nagoya, Japan, Dr Kajita graduated from the Department of Applied Physics, the University of Tokyo in 1981 and obtained his PhD from the Department of Physics, at the University of Tokyo in 1986. After working at the Institute for Molecular Science, he joined Communications Research Laboratory (CRL) in 1989. In 2004, the CRL was renamed the National Institute of Information and Communications Technology (NICT). In 2009, he was guest professor at the Provence Universite, Marseille, France.Title from PDF title page (viewed on October 16, 2018).

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Publisher

: .,

Collation

1 online resource (various pagings) :illustrations (some color).

Language

English

ISBN/ISSN

9780750321242

Classification

529/.7

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Edition

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Subject(s)

Scientific standards.
TECHNOLOGY & ENGINEERING / Measurement.
Physics
Time measurements.

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Statement of Responsibility

Masatoshi Kajita.

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