Science Questions please help Q.Q Wave Length. Just need equations?

Planck's constant is 6.63*10^(-34) 3.0*10^8 speed of light 1)What is the wavelength transmitted by an FM broadcast operating at a frequency of 100 kilohertz. 2)What is a difference in energy for photon of ultra-violet radiation, wavelength 319 and a photon of ultra-violet radiation wavelength 238? You don't need to solve it, i just want to know the equation and where to plug it in. I can do all the math myself.