Question
Question: One second is defined as...
One second is defined as
A
1650763.73 periods of Krypton clock
B
6521896 periods of krypton clock
C
165076373 periods of cesium clock
D
9192631770 periods of cesium clock
Answer
9192631770 periods of cesium clock
Explanation
Solution
The second is the duration of 9192631770 periods of the radiations corresponding to the transitions between the two hyperfine levels of the ground state of the cesium – 133 atoms.