Template:Are You Sure/October 23
Jump to navigation
Jump to search
• ... that physicist and engineer William D. Coolidge (23 October 1873 – 3 February 1975) made major contributions to X-ray machines; and that Coolidge developed ductile tungsten for incandescent light bulbs?
• ... that physicist Tullio Regge (11 July 1931 – 23 October 2014), along with physicist G. Ponzano, developed a quantum version of Regge calculus in three space-time dimensions now known as the Ponzano-Regge model, and that this was the first of a whole series of state sum models for quantum gravity known as spin foam models?