Frequency and wavelengths

Question

WEGT( Hank-FM) operates at a radio frequency of 99.9MHz

a) what is the wavelength of this radiation (hint:1MHz= 10^6Hz)

b) What is the energy of the radio frequency in the problem above in kJ?

Answer 1

(a)

Divide the speed of light by the frequency. That will give the wavelength. Be careful with units.

(b)

Multiply the frequency by Planck's constant. That will give the energy of a single photon. Be careful with units.