For 10 points, name this system consisting of one electron and one proton, an atom of the lightest element.
In this system, the energies can be corrected by examining the effects of spin-orbit coupling and Thomas precession, which are components of the fine structure correction. Perturbation theory can be used to describe the Stark and Zeeman effects in this system. The energy levels of this system are equal to negative 13.6 electron-volts divided by the square of the principal quantum number. The wavelengths of spectral lines produced in this system are given by the Rydberg formula, and an important length scale in it is the Bohr radius. For 10 points, name this system consisting of one electron and one proton, an atom of the lightest element.
In this system, the energies can be corrected by examining the effects of spin-orbit coupling and Thomas precession, which are components of the fine structure correction.
hydrogen atom [accept hydrogenic atom or hydrogen-like atom or really any atom until "13.6"]