09.29: The diagram to the right shows the lowest four energy levels for an
c1gnxk *avv xv9 i 5kcv2zv/,1electron in a hypothetical atom. The electron is excited to the -1 eV level of the atom and transiti
g nv 5cz1a/29* v kk1vivcxv,xons to the lowest energy state by emitting only two photons. Which of the following energies could not belong to either of the photons?