Question

The SI unit of time is the second, which is defined as 9,192,631,770 cycles of radiation associated with a certain emission process in the Cesium atom. Calculate the wavelength of this radiation (to 3 sig figs). In which region of the electromagnetic spectrum is the wavelength found?

Answer 1

first reaction: the number of cycles (the 9 billion number) per second is the frequency of the radiation, and the unit is hertz.

in that case, the wavelength is the speed of light divided by the frequency, approx:

wavelength = (3 x 10^8 ) / ( 9 x 10^9 ) = 0.033 meter

the units used are meter, second, and Hz

this would be microwave. i am not sure about this so take it with a grain of salt.