XXth century_physics
XXth century_physics
XXth century_physics
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Sommerfeld extended Bohr’s model by<br />
introducing two additional quantum<br />
numbers and explaining the fine<br />
structrure of the H α line<br />
[Ann. d. Physik 51, 94, 125 (1916)]<br />
Arnold Sommerfeld<br />
(1868-1951)<br />
Niels Bohr<br />
(1885-1962)