PhysLink.com Logo

Question

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 1014 in scientific notation...
Answered by: Yasar Safkan, Ph.D., Sofware Engineer, Noktalar A.S., Istanbul, Turkey


Science Quote

'A hundred times every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving…'

Albert Einstein
(1879-1955)


All rights reserved. © Copyright '1995-'2017 PhysLink.com