A hydrogen atom absorbs a photon carrying 2.5 eV of energy. Which energy level of the atom was occupied before the photon was absorbed? Which energy level of the atom was occupied after the photon was absorbed? Use the simulation to confirm your answers.

Energy and frequency of light are related by E=hf, where h is Planck’s constant. Use this to determine which of the transitions you observe in this model give rise to visible light. What colors of light are emitted and absorbed?