09.29: The diagram to the right shows the lowest four
j a7kc,+lye(b t5iit: energy levels for an electron in a hypothetical atom. The electron is excited to the -1 eV level of the at
: 5 k7icel+t bjia(,ytom 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?