09.29: The diagram to the right shows the lowes
un+5c,zqizg xiy5a+s:c 5q, gt 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 only t
q, nz:g+,si c5yx i+zcu5agq 5wo photons. Which of the following energies could not belong to either of the photons?