English

TIME From Earth Rotation To Atomic Physics

In the 21st century, we take the means to measure time for granted, without contemplating the sophisticated concepts on which our timescales are based. This volume presents the evolution of concepts of time and methods of timekeeping up to the present day. It outlines the progression of time based on sundials, water clocks, and the Earth’s rotation, to time measurement using pendulum clocks, quartz crystal clocks, and atomic frequency standards. Timescales created as a result of these improvements in technology and the development of general and special relativity are explained. This second edition has been updated throughout to describe 20th-and 21st-century advances and discusses the redefinition of SI units and the future of Coordinated Universal Time (UTC). A new chapter on time and cosmology has been added. This broad-ranging reference benefits a diverse readership, including

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