Ralph Kronig
| Ralph Kronig | |
|---|---|
| Born | 10 March 1904 | 
| Died | 16 November 1995 (aged 91) | 
| Nationality | German | 
| Citizenship | United States Germany | 
| Alma mater | Columbia University | 
| Known for | Discovery of particle spin Kronig structure Kronig–Penney model Coster–Kronig transition Kramers–Kronig relations | 
| Awards | Max Planck Medal (1962) | 
| Scientific career | |
| Institutions | Columbia University TU Delft | 
| Doctoral advisor | Albert Potter Wills | 
| Other academic advisors | Wolfgang Pauli | 
| Signature | |
Ralph Kronig (10 March 1904 – 16 November 1995) was a German physicist. He is noted for the discovery of particle spin and for his theory of X-ray absorption spectroscopy. His theories include the Kronig–Penney model, the Coster–Kronig transition and the Kramers–Kronig relations.