This energy level diagram illustrates the emission process where an electron moves to a lower energy level and emits a photon. Qualitatively, how much energy would the emitted photon have for the given transition from E3 to E1. Explain your answer. E5 (n=5) E4 (n= 4) E3 (n= 3) Energy E2 (n=2) E1 (n= 1) Explain here.