1. The problem statement, all variables and given/known data Photons can be observed by the human eye as long as their energies are between 1.8 eV and 3.1 eV. In a particular atom one of the electron energy levels is at -60.0 eV. Can electron transitions, associated with this energy level produce photons that are visible to the human eye? Explain why your answer is ’yes’ or ’no’. 2. Relevant equations I'm not sure about these En=-(Z2E0)/n2 Em=-(Z2E0)/m2 n>m 3. The attempt at a solution ΔEn→m=-Z2E0(1/n2-1/m2) Where E0=13.6eV I know the answer is 'no' and that we are meant to get to a point where n/m<1 to show that the answer is 'no', but I don't know where to go from here.