PHYS 2004 Lecture Notes - Lecture 32: Photon
1 Dec 2017
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If n > m, an atom can emit a photon in an n m transition or absorb a photon in an m n. Shown is an energy-level diagram for the hydrogen atom. transition. The top rung is called the ionization limit. The frequency of the photon emitted by an atom when its electron goes from the n to the m state is. We have solved for the allowed energies of the hydrogen atom, so we can predict all the possible wavelengths of the hydrogen spectrum:
