Fizeau-Foucault apparatus

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	Léon Foucault - Wikipedia, the free encyclopedia
		Foucault invented in 1857 the polarizer which bears his name, and in the succeeding year devised a method of giving to the mirror of reflecting telescopes the shape of a spheroid or a paraboloid of revolution.
		Foucault died of what was probably a rapidly-developing case of multiple sclerosis on February 11, 1868 at Paris and was buried in the Cimetière de Montmartre.
		Foucault was the son of a publisher at Paris, where he was born on September 18, 1819.
	en.wikipedia.org /wiki/L%c3%a9on_Foucault (668 words)

	Speed of light - The Encyclopedia
		Fizeau's method was later refined by Marie Alfred Cornu (1872) and Joseph Perrotin (1900).
		Foucault's estimate, published in 1862, was 298,000 kilometres per second.
		Any slight change in speed of light along each arm of the interferometer (due to the fact that the apparatus was moving with the Earth through the proposed "aether") would change the amount of time that the beam spent in transit, which would then be observed as a change in the pattern of interference.
	www.the-encyclopedia.com /description/Speed_of_light (4275 words)

	All words on Hippolyte Fizeau
		In 1849 he published the first results obtained by his method for determining the speed of light (see Fizeau-Foucault apparatus), and in 1850 with E. Gounelle measured the speed of electricity.
		Fizeau, Hippolyte Fizeau, Hippolyte Fizeau, Hippolyte de:Armand Hippolyte Louis Fizeau fr:Hippolyte Fizeau sl:Armand-Hippolyte-Louis Fizeau
		His earliest work was concerned with improvements in photographic processes; and then, in association with J. Foucault, he engaged in a series of investigations on the interference of light and heat.
	www.allwords.org /hi/hippolyte-fizeau.html (497 words)

	Stransim
		A modification of Foucault's experiment was used by Michelson in 1924 to determine essentially the value that is used today for the speed of light through air.
		Another French physicist in 1850 named Jean Foucault came up with a more accurate laboratory method that only required a stationary mirror to be on the order of 20 meters away from a light source.
		To illustrate a clasical experiment created by Jean Foucault to determine the speed of light in a laboratory setting.
	www.stransim.com /speedc.htm (381 words)

	All words on Marie Alfred Cornu
		Fizeaus method (see Fizeau-Foucault Apparatus), introducing various improvements in the apparatus, which added greatly to the accuracy of the results.
		This achievement won for him, in 1878, the prix Lacaze and membership of the Academy of Sciences in France, and the Rumford Medal of the Royal Society in England.
		In particular he carried out a classical redetermination of the speed of light by A.
	www.allwords.org /ma/marie-alfred-cornu.html (567 words)

	Lord Chief Justice of Ireland . Ireland . United Kingdom . 1208 . 1870s . Irish Free State . Jane Austen . 1918 . Seanad Éireann
		The Fizeau-Foucault apparatus 1850 was designed by the France French physics physicists Hippolyte Fizeau and Leon Foucault Léon Foucault for measuring the speed...
	www.uk.kunsimuna.net /Lord_Chief_Justice_of_Ireland_UK_206022_mu (917 words)

	1850 in science
		Léon Foucault demonstrates the greater speed of light in air than in water, and to establish that the speed of light in different media is inversely as the refractive indices of the media (see Fizeau-Foucault Apparatus)
		Hippolyte Fizeau and E. Gounelle measure the speed of electricity
		Rudolf Clausius publishes his paper on the mechanical theory of heat, which first states the basic ideas of the second law of thermodynamics
	www.brainyencyclopedia.com /encyclopedia/1/18/1850_in_science.html (205 words)

	Business Software Review : Article 'Harold Furth'
		Physics Claims regarding bubble fusion, in which a table-top apparatus is reported as producing small-scale fusion in a liquid undergoing acoustic cavitation are published.
		Medicine December 19 - Clozapine is the first drug approved by the FDA for reducing the risk of suicidal behaviour.
		Technology November 4, A Tactical high energy laser prototype shot down an incoming artillery shell.
	www.business-software-review.org /DisplayArticle60235.html (559 words)

	Fizeau-Foucault apparatus
		The Fizeau-Foucault apparatus (1850) was designed by the French physicists Hippolyte Fizeau and Léon Foucault for measuring the speed of light.
		Foucault based his apparatus on an earlier experiment by Fizeau who, in 1849, used two fixed mirrors, one partially obscured by a rotating cogwheel.
		As the rotating mirror will have moved slightly in the time it takes for the light to bounce off the stationary mirror (and return to the rotating mirror), it will thus be deflected away from the original source, by a small angle.
	www.termsdefined.net /fi/fizeau-foucault-apparatus.html (180 words)

	1850 in science
		Léon Foucault demonstrates the greater speed of light in air than in water, and to establish that the speed of light in different media is inversely as the refractive indices of the media (see Fizeau-Foucault Apparatus)
		Hippolyte Fizeau and E. Gounelle measure the speed of electricity
		Rudolf Clausius publishes his paper on the mechanical theory of heat, which first states the basic ideas of the second law of thermodynamics
	www.worldhistory.com /wiki/1/1850-in-science.htm (164 words)

	Marie_Alfred_Cornu
		Fizeau 's method (see Fizeau-Foucault Apparatus), introducing various improvements in the apparatus, which added greatly to the accuracy of the results.
		In particular he carried out a classical redetermination of the
		This achievement won for him, in 1878, the prix Lacaze and membership of the
	en.wikipedia.org /wiki/Marie_Alfred_Cornu (164 words)

	chap6.htm - SEEKING THE SPEED OF LIGHT
		Having greatly improved Fizeau's apparatus, Foucault went on to construct better mechanisms, but similar experiments.
		Jean Bernard Leon Foucault(1819-1868) worked with Fizeau in the determination of light speed.
		Armand Hippolyte Louis Fizeau(1819-1896), in 1849 attempted a non-astronomical method to determined light's speed using a spinning toothed wheel to create a stroboscope effect.
	home.iprimus.com.au /longhair1/chap6.htm (164 words)

	Articles - Light
		The first successful measurement of the speed of light using an earthbound apparatus was carried out by Hippolyte Fizeau in 1849.
		Fizeau directed a beam of light at a mirror several thousand metres away, and placed a rotating cog wheel in the path of the beam from the source to the mirror and back again.
		Knowing the distance to the mirror, the number of teeth on the wheel, and the rate of rotation, Fizeau measured the speed of light as 313,000 kilometres per second.
	www.poncier.com /articles/Light (164 words)

	Charles Wheatstone - Wikipedia, the free encyclopedia
		Wheatstone's device of the revolving mirror was afterwards employed by Foucault and Fizeau to measure the velocity of light.
		In 1845 Wheatstone introduced two improved forms of the apparatus, namely, the 'single' and the 'double' needle instruments, in which the signals were made by the successive deflections of the needles.
		In 1859 Wheatstone was appointed by the Board of Trade to report on the subject of the Atlantic cables, and in 1864 he was one of the experts who advised the Atlantic Telegraph Company on the construction of the successful lines of 1865 and 1866.
	www.wikipedia.org /wiki/Charles_Wheatstone (4513 words)

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Topic: Fizeau-Foucault apparatus

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