Atoms of lithium are able to absorb photons of frequency 2.01 x 1014 Hz. This corresponds to a transition from the ground state (at –5.37 ev) to an excited state. Zero energy corresponds to the state in which one electron is completely removed from the atom. (Use h = 4.14 x 10–15 ev s and c = 3.0 x 108 m/s.)
If a photon ionizes a lithium atom, what conclusion can be drawn about the photon?