Photon energy is related to wavelength by the Planck equation E=hc where h is Planck's constant, 6.63 3 10^-34 J s, and c is the speed of light, 3.00 * 10^8 m/s. If the energy released by an electron making a transition from one hydrogen atom orbit to another is 1.64*10^-18 J, what is the wavelength of the photon? Which part of the electromagnetic spectrum is that in? In which orbit did the electron start, and in which orbit did it finish? (Hint: examine the concept art: atomic spectra)