Rydberg, Johannes Robert
Rydberg, Johannes Robert yo͞o´hänəs rô´bərt rüd´bĕryə [key], 1854–1919, Swedish physicist. Rydberg was a professor at Lund from 1901 to 1919. He is best known for his grouping of the frequencies of certain lines of the emission spectra of the elements into simple series characterized by a running integer and a universal
Rydbergconstant. These series helped guide the development of atomic physics. Rydberg also wrote on the structure of the periodic table of the elements.
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