09.29: The diagram to the right shows
/sqhtjd c -4q7hdv-w99p) rrdrvo3g : the lowest four energy levels for an electron in a hypothetical atom. The electron is excited to t
r tvgj49orhd -wp)q/d7qd -v9sr3c h: he -1 eV level of the atom and transitions to the lowest energy state by emitting only two photons. Which of the following energies could not belong to either of the photons?