Techno-Science.net: Léon Foucault
- #news
- #headline

Figure timeline
Jean Bernard Léon Foucault was a French physicist who invented the Foucault pendulum, a device demonstrating the effect of Earth's rotation. He also made an early measurement of the speed of light, discovered eddy currents, and is credited with naming the gyroscope.
Text from Wikipedia, available under CC BY-SA 4.0.
science · French physicist (1819–1868) · physicist · astronomer · also Léon Foucault, John Bernard Foucault, Foucault
Born 18 September 1819 · Died 11 February 1868 · Q187966
31 published statements · 0 followers
See & hear
3 photos · 1 audio
Listen
Foucault pendulum
Media from Wikimedia Commons, hotlinked at the source under its own licence — see each file for author and terms.
Live now
Pulling headlines from trusted outlets — this usually takes a few seconds
Checking the wires…
Feed scan
These are live links, not archived citations — they only join the timeline once a collect run verifies and archives them.
Live pulse
Most recent outstanding titles, awards, and quotes
Techno-Science.net: Léon Foucault
Techno-Science.net: Jean Bernard Léon Foucault - Définition
Christian Science Monitor: Google doodle celebrates Léon Foucault's pendulum
The Guardian: French physicist Léon Foucault celebrated in Google doodle
Gentside: Léon Foucault : comment le pendule du physicien français prouve que la Terre tourne
BFM Business: Google rend hommage à Léon Foucault
Christian Science Monitor: How Léon Foucault taught us to watch the world spin
Europe1: Le pendule de Léon Foucault à l'honneur sur Google
SiliconRepublic: Léon Foucault’s pendulum illustrated in interactive Google Doodle
Search Engine Land: Léon Foucault Honored With A Google Logo To Mark His 194th Birthday
Indiatimes: Google marks Léon Foucault's 194th birthday with a doodle
Published “Discipline and Punish” in On Violence — cited 2,899 times.
Le Monde.fr: Léon Foucault, ou l'astronomie par l'invention
Published “Of Other Spaces” in Diacritics — cited 3,589 times.
Published “The Subject and Power” in Critical Inquiry — cited 4,680 times.
Died 1868-02-11.
Text from Wikipedia, available under CC BY-SA 4.0.
“To contribute usefully to the advance of science, one must sometimes not disdain from undertaking simple verifications.”
Published his papers on a modification of James Watt's centrifugal governor; he had for some time been experimenting with a view to making its period of revolution constant and developing a new apparatus for regulatin
Text from Wikipedia, available under CC BY-SA 4.0.
Awarded Foreign Member of the Royal Society (1864).
Text from Wikipedia, available under CC BY-SA 4.0.
And member of the mechanical section of the Institute a year later
Text from Wikipedia, available under CC BY-SA 4.0.
Awarded Officer of the Legion of Honour (1862).
Text from Wikipedia, available under CC BY-SA 4.0.
Foucault was made a member of the Bureau des Longitudes and an officer of the Legion of Honour
Text from Wikipedia, available under CC BY-SA 4.0.
Determined the speed of light to be 298,000 km/s – 10,000 km/s less than that obtained by previous experimenters and only 0
Text from Wikipedia, available under CC BY-SA 4.0.
Foucault invented the polarizer which bears his name, and in the succeeding year devised a method of testing the mirror of a reflecting telescope to determine its shape
Text from Wikipedia, available under CC BY-SA 4.0.
Won Copley Medal (1855).
Text from Wikipedia, available under CC BY-SA 4.0.
Received the Copley Medal of the Royal Society for his 'very remarkable experimental researches'
Text from Wikipedia, available under CC BY-SA 4.0.
Provided an experimental demonstration of the rotation of the Earth on its axis (diurnal motion)
Text from Wikipedia, available under CC BY-SA 4.0.
Did an experiment using a rotating mirror to measure the speed of light; it was viewed as "driving the last nail in the coffin" of Newton's corpuscular theory of light when it showed that light travels more slowly thr
Text from Wikipedia, available under CC BY-SA 4.0.
Foucault experimentally demonstrated that absorption and emission lines appearing at the same wavelength are both due to the same material, with the difference between the two originating from the temperature of the ligh
Text from Wikipedia, available under CC BY-SA 4.0.
Studied at Paris Medical Faculty (1839).
Text from Wikipedia, available under CC BY-SA 4.0.
Born 1819-09-18.
Text from Wikipedia, available under CC BY-SA 4.0.
Connections