Richard Threlkeld Cox | |
|---|---|
| Born | (1898-08-02)August 2, 1898 |
| Died | May 2, 1991(1991-05-02) (aged 92) |
| Nationality | American |
| Education | Johns Hopkins University |
| Known for | Cox's theorem |
| Scientific career | |
| Institutions | New York University Johns Hopkins University |
Richard Threlkeld Cox (August 5, 1898 – May 2, 1991) was a professor ofphysics atJohns Hopkins University, known forCox's theorem relating to the foundations ofprobability.[1]
He was born inPortland, Oregon, the son of attorney Lewis Cox and Elinor Cox. After Lewis Cox died, Elinor Cox married John Latané, who became a professor at Johns Hopkins University in 1913. In 1915 Richard enrolled at Johns Hopkins University to study physics, but his studies were cut short when he was drafted forWorld War I. He stayed in the US after being drafted and returned to Johns Hopkins University after the war, completing his BA in 1920. He earned his PhD in 1924; his dissertation wasA Study of Pfund's Pressure Gauge.[1]
He taught atNew York University (NYU) from 1924 to 1943, before returning to Johns Hopkins to teach. He studied probability theory, the scattering of electrons, and the discharges ofelectric eels.[1] Richard Cox's most important work wasCox's theorem.[2]
His wife,Shelby Shackleford (1899Halifax, Virginia – 1987), whom he married in 1926, was an accomplished artist and illustratedElectric Eel Calling, a book on electric eels.[1]
He died on May 2, 1991. His doctoral students includeCarl T. Chase andClifford Shull.
According toT. D. Lee andC. N. Yang,parity violation implies that electrons produced byβ decay should be longitudinally polarized.[3] In 1959,Lee Grodzins indicated how a 1928 experiment by R. T. Cox, C. G. McIlwraith, and B. Kurrelmeyer on double scattering of β rays from radium[4][5] confirms the polarization effect predicted by Lee and Yang.[6]Carl T. Chase in 1929 and 1930 performed experiments confirming the 1928 experiment by Cox, McIlwraith, and Kurrelmeyer.[6]
Witten:... I wanted to tell you something about Richard Cox. You mentioned Richard Cox. He did a lot of things, but he also did some experiments incondensed matter physics. He discovered an anomaly which wasn't consistent with physics. It couldn't be explained. It wasn't at all consistent, and he was told his experiment was wrong, and he knew that his experiment was right. So he published it, and it was an anomaly in the literature. Some years later, it was discovered that parity wasn't conserved, and his anomaly was non-parity. It's well known now by many people that his experiment was the first experiment that would have shown parity wasn't conserved if they had interpreted it correctly.
Rickles:But he didn't give that interpretation; he just thought there was something strange.
Witten:That's right. But he knew that his experiment was right and that people were trying to tell him that his experiment was wrong.[7]
