A photon emitted as a hydrogen atom undergoes a transition from the n = 5 state to the n = 2 state. The energy of the ground state is 13.6 eV.
Find the wavelength of the emitted photon. The speed of light is 3 × 10^8m/s and Planck's constant is 6.626 × 10^?34J · s.
Find the frequency of the emitted photon.