1. The problem statement, all variables and given/known data A hydrogen atom is initially in the state n=3. Subsequently it falls to its ground state with the emission of a photon. If the photon energy is ћω , then what is the ground state energy? 3. The attempt at a solution I tried using E= h².n²/8ma². and got -9ћω/8 I wasn't to sure how to go about with this question.