The Rydberg formula for spectral lines is successfully explained by a model named for this man using transitions in energy levels, and that model named for this man preceded the quantum model.
The Compton wavelength is equal to the fine-structure constant times a quantity named for this man with a value of about 0.53 angstroms. This man described the imitation of quantum physics to classical mechanics at large numbers as the correspondence principle, and he has a namesake (*) "radius." The Rydberg formula for spectral lines is successfully explained by a model named for this man using transitions in energy levels, and that model named for this man preceded the quantum model. For 10 points, name this Danish physicist who theorized a model of the atom with positively charged nuclei and concentric rings of orbiting electrons.
The Compton wavelength is equal to the fine-structure constant times a quantity named for this man with a value of about 0.53 angstroms.
Niels (Henrik David) Bohr (accept answers like Bohr radius or Bohr model)