Jules Antoine Lissajous, French mathematician and academic (d. 1880)
Jules Antoine Lissajous (French pronunciation: [ʒyl ɑ̃twan lisaʒu]; 4 March 1822 in Versailles – 24 June 1880 in Plombières-les-Dijon) was a French physicist, after whom Lissajous figures are named. Among other innovations, Lissajous invented the Lissajous apparatus, a device that creates the figures that bear his name. In it, a beam of light is bounced off a mirror attached to a vibrating tuning fork, and then reflected off a second mirror attached to a perpendicularly oriented vibrating tuning fork (usually of a different pitch, creating a specific harmonic interval), onto a wall, resulting in a Lissajous figure. This led to the invention of other apparatus such as the harmonograph.
1822Mar, 4
Jules Antoine Lissajous
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Events on 1822
- 13Jan
First National Assembly at Epidaurus
The design of the Greek flag is adopted by the First National Assembly at Epidaurus. - 15Jan
Demetrios Ypsilantis
Greek War of Independence: Demetrios Ypsilantis is elected president of the legislative assembly. - 2Jul
Denmark Vesey
Thirty-five slaves are hanged in South Carolina, including Denmark Vesey, after being accused of organizing a slave rebellion. - 26Jul
Guayaquil Conference
José de San Martín arrives in Guayaquil, Ecuador, to meet with Simón Bolívar. - 27Sep
Rosetta Stone
Jean-François Champollion announces that he has deciphered the Rosetta Stone.