The second is the duration of $9192631770$ periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium $133$ atom.

True

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False

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Solution

The correct option is A True
Second (s) The second is the SI base unit for time. The second is used to measure time.
At its 13th official meeting in 1967, the committee adopted the following definition: The second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom.

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1 second is the time interval of 9192631770 vibrations of radiation corresponding to the transition between two hyperfine levels of the ground state of caesium 133 atom

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The second is the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom.

The second is the duration of $9192631770$ periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium $133$ atom.