Consider the following two quantum processes, each of which always emits a photon of a specific wavelength: (1) a 1.45-nm gamma ray from the nuclear process of cobalt-56 radioactive decay and (2) the 546-nm photon from the de-excitation of mercury in a street lamp (in the regime of chemical binding energies). 

(a) Determine the energy of the emitted photon (in units of joules and electron-volts) for each process. 

(b) Calculate the ratio of the photon energies. How does the photon energy released from nuclear processes compare with that of chemical processes?