2 questions

What is the frequency of radiation whose wavelength is 2.40 x 10^{-5}cm?

What is the energy of a photon with frequency equal to 5.2 x 10^{15}s^{-1} ?

Use: f = c/lambda where f is frequency, c is speed of light, lambda is wavelength

E = hf where E is energy, h is Planck's constant, f is frequency