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Jean Bernard Léon Foucault (UK: / ʒ ɒ̃ ˈ b ɛər n ɑːr ˌ l eɪ ɒ̃ ˈ f uː k oʊ /, US: / ˌ ʒ ɒ̃ b ɛər ˈ n ɑːr l eɪ ˌ ɒ̃ f uː ˈ k oʊ /; French: [ʒɑ̃ bɛʁnaʁ leɔ̃ fuko]; 18 September 1819 – 11 February 1868) was a French physicist best known for his demonstration of the Foucault pendulum, a device demonstrating the effect of Earth's rotation.
In Foucault's 1862 experiment, he desired to obtain an accurate absolute value for the speed of light, since his concern was to deduce an improved value for the astronomical unit. [2] [Note 4] At the time, Foucault was working at the Paris Observatory under Urbain le Verrier. It was le Verrier's belief, based on extensive celestial mechanics ...
Foucault published two papers in 1852, one focused on astronomy with the weight free to move on all three axes (On a new experimental demonstration of the motion of the Earth, based on the fixity of the plane of rotation) [8] and the other on mechanics with the weight free to move on only two axes (On the orientation phenomena of rotating bodies driven by a fixed axis on the Earth's surface.
The Foucault pendulum or Foucault's pendulum is a simple device named after French physicist Léon Foucault, conceived as an experiment to demonstrate the Earth's rotation. If a long and heavy pendulum suspended from the high roof above a circular area is monitored over an extended period of time, its plane of oscillation appears to change ...
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In France, The Order of Things established Foucault's intellectual pre-eminence among the national intelligentsia; in a review of which, the philosopher Jean-Paul Sartre said that Foucault was "the last barricade of the bourgeoisie." Responding to Sartre, Foucault said, "poor bourgeoisie; if they needed me as a 'barricade', then they had ...
Figure 2: Chronograph record from Cornu's speed of light determination shows wheel rotations, timing signals based on the observatory clock, and observer markings.
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