09.29: The diagram to the right shows the lowest four ener
kqomf 8zw ,.uc(yeh *ew4f7v8 n,n-kj gy levels for an electron in a hypothetical atom. The electron is excited to the -1 eV level of the atom and transi
ej mhqw(oz,8kf.4nnc-fv8eku y, * w7tions to the lowest energy state by emitting only two photons. Which of the following energies could not belong to either of the photons?