09.29: The diagram to the right shows the low
w y mq/h.uf:i;t;8bc9 ogi;ljest four energy levels for an electron in a hypothetical atom. The electron is excited to the -1 eV level of the atom and transitions to the lowest energy state by emitting
lim;i b ; g8/.cyw9 jftuqho;: only two photons. Which of the following energies could not belong to either of the photons?