How many oscillations does a caesium atomic clock make in a day?

Asked by:
Joanna

Answer

Let us start with the definition of the second:

'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.'

So a cesium atomic clock would make just over 9 billion oscillations_per _second (OPS).
Finding how many oscillations_per_day (OPD) is just a matter of multiplication:

OPD = OPS x 60 x 60 x 24

Where OPD is oscillations per day, and OPS is oscillations per second.

So we find out that the number of oscillations per second is:

794 243 384 928 000

That's 7.94 x 10^{14} in scientific notation...
Answered by:
Yasar Safkan, Ph.D., Sofware Engineer, Noktalar A.S., Istanbul, Turkey

'The difference between what the most and the least learned people know is inexpressibly trivial in relation to that which is unknown.'