Griffiths writes that the formula for the hydrogen energy levels taking fine structure into account "breaks the degeneracy in [itex]l[/itex]" but "still preserves degeneracy in [itex]j[/itex]." I'm confused by this, because the formula he gives (Eq. 6.67 in the textbook) depends on [itex]j[/itex]. How can the system be degenerate in [itex]j[/itex] if the energies depend on [itex]j[/itex]?(adsbygoogle = window.adsbygoogle || []).push({});

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# Fine structure of hydrogen

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