1. (a) Calculate the Energy of Photons ejected from a 1.00-mm? area of sodium metal by 500-nm EM radiation. (b) Given that the binding energy is 2.28 eV, what Kinetic Energy is carried away by the electrons? 2. (a) Calculate the momentum of a photon having a wavelength of 6.5 um. (b) What is the kinetic energy of an electron having the same momentum, and how does it compare with that of the photon? 3. (a) Find the momentum of a 100-keV x-ray photon. (b) Find the kinetic energy, in keV, of a neutron with the same momentum. 4. Calculate the energy, in electron volts, of a photon whose frequency 1s (a) 6.20 x 102 THz, (Tera=x 1012) (b) 3.10 GHz (Giga = x 107)