cesium 133
noun
: an isotope of cesium used especially in atomic clocks and one of whose atomic transitions is used as a scientific time standard
Examples of cesium 133 in a Sentence
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The official length of the basic unit, the second, was fixed at 9,192,631,770 vibrations of an atom of cesium 133.
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Alanna Mitchell, New York Times, 14 Nov. 2022
But improving upon the cesium 133 atom comes with improvements in our laser capabilities.
—Tim Newcomb, Popular Mechanics, 26 Apr. 2022
Since 1967, the second has been defined by the cesium 133 atom.
—Tim Newcomb, Popular Mechanics, 26 Apr. 2022
In the case of cesium 133, the frequency is nearly 9.2 billion ticks per second — 9,192,631,770, to be precise.
—New York Times, 25 Apr. 2022
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Alanna Mitchell, New York Times, 14 Nov. 2022
But improving upon the cesium 133 atom comes with improvements in our laser capabilities.
—Tim Newcomb, Popular Mechanics, 26 Apr. 2022
Since 1967, the second has been defined by the cesium 133 atom.
—Tim Newcomb, Popular Mechanics, 26 Apr. 2022
In the case of cesium 133, the frequency is nearly 9.2 billion ticks per second — 9,192,631,770, to be precise.
—New York Times, 25 Apr. 2022
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“Cesium 133.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cesium%20133. Accessed 22 Dec. 2024.
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