Article
Article
Time
Article By:
Barger, Vernon D. Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin.
Last reviewed:December 2020
DOI:https://doi.org/10.1036/1097-8542.697400
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- Time, published January 2014:Download PDF
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The dimension of the physical universe that orders the sequence of events at a given place; also, a designated instant in this sequence, such as the time of day, technically known as an epoch, or sometimes as an instant. While time is objectively measurable and quantifiable (Fig. 1), the dimension of time as a fundamental phenomenon and/or property of the universe remains a source of great debate in theoretical physics. This article will first briefly explore that debate and then address practical matters of time measurement and timekeeping. See also: Physics; Theoretical physics; Universe
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