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How is a second measured?

Updated: 4/28/2022
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14y ago

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A second (when talking about time) is measured through the knowledge that a Cesium atom regularly emits a detectable number of photons. Many atomic clocks are placed around the world in order to account for possible effects that changes in environments would have, which are negligible.

There are also 60 seconds in a minute, and 60 minutes in a degree when talking about geometric angles.

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Q: How is a second measured?
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