ck's constant and me is the mass of an electron. show that this relationship is true by completing the statement. you are currently in a labeling module. turn off browse mode or quick nav, tab to items, space or enter to pick up, tab to move, space or enter to drop. the energy of the incoming photon, ????total, is conserved in photoelectron spectroscopy. therefore, the energy of the incoming photon is equal to the , plus the , so . the energy of the incoming photon can also be expressed as , and the kinetic energy of the outgoing electron can be expressed as . the energy required to eject the electron corresponds to the . substituting these expressions into the original expression for ????total produces the desired relationship between the speed of the ejected electron and the frequency of the incoming radiation, . answer bank