PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation
Problem
For a hydrogen atom, the energy of the n=5 level is −0.54eV and the energy of the ground state is −13.6eV. One possible relaxation path for an electron starting in the n=5 level is the cascade 5→4→3→2→1. Calculate the energy (in eV) of each photon emitted in this cascade and verify that the sum of these photon energies equals the energy that would be released in a direct 5→1 transition.