zadi

What physical phenomena (other than a pendulum or cesium clock) could you use to define a time standard?

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abduu

A time standard is a specification for measuring time: either the rate at which time passes; or points in time; or both. In modern times, several time specifications have been officially recognized as standards, where formerly they were matters of custom and practice. ...

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asif.ali

Device used for the realization of the time unit.

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