Question

In cesium atomic clock ______ is used.A. cesium-122 atom
B. cesium-132 atomC. cesium-133 atom
D. cesium-134 atom

Answer 1

Answer ⇒ Cesium 133 atom.

In cesium atomic clock __cesium-133 atom___ is used.

Explanation ⇒ In the Atomic Clock, Cesium 133 atoms are used because they have periodic number of the vibrations,i.e., 9192631770 in the duration of 1 second which are corresponding to the transition between the two hyperfine levels of the cesium 133 atom.

Other Cesium Isotopes are not used because they are not exactly periodic and do not emits the periodic vibrations like Cesium-133 atoms.

Hence, Option C. is correct.

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Answer 2

Option (C) cesium-133 atom

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