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Topic: Hippolyte Fizeau

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	Adventures in CyberSound: Fizeau, Armand-Hippolyte-Louis
		Fizeau became a member of the French Academy in 1860 and was appointed superintendent of physics at the École Polytechnique, Paris, in 1863.
		Fizeau, born in Paris, studied at the College de France and with François Arago at the Paris Observatory.
		In 1849 Fizeau was the first to measure the velocity of light by a laboratory experiment in which a ray of light was cut by a toothed wheel, producing intermittent flashes.
	www.acmi.net.au /AIC/FIZEAU_BIO.html (732 words)

	Armand Hippolyte Louis Fizeau - Wikipedia
		Fizeau beschäftigte sich als Privatgelehrter mit Physik und Astronomie.
		1849 nahm Fizeau Messungen der Lichtgeschwindigkeit in verschiedenen Medien vor.
		Fizeau arbeitete auch auf dem Gebiet der Thermodynamik, wo er ein Interferenzdilatometer zur Messung der Wärmeausdehnung fester Körper konstruierte.
	de.wikipedia.org /wiki/Armand_Fizeau (350 words)

	Armand-Hippolyte-Louis Fizeau Biography / Biography of Armand-Hippolyte-Louis Fizeau History of Scientific Discovery ...
		Fizeau and Foucault set out to perform Arago's experiment in 1845, and within a few years they had developed a method for measuring the speed of light terrestrially.
		Fizeau spun the gear very fast, so that light passing through one gap in the gear's teeth would travel to the mirror, bounce back, and reenter through the next gap.
		Fizeau hypothesized that if a light source was moving toward an observer, the waves would be pushed together, shifting the absorption lines toward the violet end of the spectrum; if the source was moving away, the light would shift toward the red.
	www.bookrags.com /biography-armand-hippolyte-louis-fizeau-wsd (951 words)

	iqexpand.com (Site not responding. Last check: 2007-10-21)
		Hippolyte Fizeau, physicien franÃ§ais, nÃ© Ã Paris [1819-1896].
		Fizeau directed a beam of light at a mirror several thousand metres away, and placed a...
		Hippolyte Fizeau discovered independently the same phenomenon on electromagnetic waves in 1848 (in France, the...
	hippolyte_fizeau.iqexpand.com (355 words)

	Hippolyte Fizeau - Wikipedia
		Armand Hippolyte Louis Fizeau (* 23 september 1819 te Parijs, † 18 september 1896 te Venteuil) was een Frans natuurkundige.
		Fizeau begon zijn carrière met onderzoek naar verbeteringen in het fotografisch proces.
		Later bestudeerde hij samen met Léon Foucault de interferentie van licht en warmte.
	nl.wikipedia.org /wiki/Hippolyte_Fizeau (174 words)

	Hippolyte - Encyclopedia Glossary Meaning Explanation Hippolyte (Site not responding. Last check: 2007-10-21)
		In Greek mythology, Hippolyte was the Amazonian queen, who possessed a magical girdle given to her by Ares, her father.
		According to another the girdle is obtained by Herakles kidnapping Hippolyte's sister, Melanippe, and demanding the girdle as the ransom, succeeding and thus releasing the sister.
		In the version where Theseus is married to, and leaves, Hippolyte, Hippolyte tries to exact revenge by bringing the Amazons into Theseus and Phaedra's wedding to kill everyone, though this fails as she is killed by, in some versions Theseus' men, in others Penthesilea, another Amazon.
	www.encyclopedia-glossary.com /en/Hippolyte.html (442 words)

	Doppler effect - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-21)
		Hippolyte Fizeau discovered independently the same phenomenon on electromagnetic waves in 1848 (in France, the effect is sometimes called "effet Doppler-Fizeau").
		The first attempt to extend Doppler's analysis to light waves was soon made by Fizeau.
		In fact, light waves do not require a medium to propagate and the correct understanding of the Doppler effect for light requires the use of the Special Theory of Relativity.
	www.newlenox.us /project/wikipedia/index.php/Doppler_effect (1351 words)

	Hippolyte Armand Louis Fizeau Biography / Biography of Hippolyte Armand Louis Fizeau Biography Biography
		Hippolyte Fizeau was born in Paris on Sept. 23, 1819, the son of a wealthy physician and professor at the Faculty of Medicine in Paris.
		Meanwhile, Fizeau hit upon the cogwheel method of measuring the speed of light and by September 1849 obtained the value of 315,000 kilometers per second.
		During the intervening months Fizeau had also succeeded in measuring the change of the velocity of light in a rapidly flowing column of water, which greatly strengthened belief in the wave theory of light.
	www.bookrags.com /biography/hippolyte-armand-louis-fizeau (565 words)

	Hippolyte Louis Fizeau: Speed of light
		A Frenchman, Fizeau, shone a light between the teeth of a rapidly rotating toothed wheel.
		Fizeau measured the speed of light to be 313,300 Km/s.
		He shone a light to a rotating mirror, then it bounced back to a second stationary mirror and then back to the first rotating mirror.
	www.speed-light.info /measure/fizeau.htm (773 words)

	Science Fair Projects - 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.
		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.
		Foucault based his apparatus on an earlier experiment by Fizeau who, in 1849, used two fixed mirrors, one partially obscured by a rotating cogwheel.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Fizeau-Foucault_apparatus (300 words)

	Untitled Document
		By observing the motions of Jupiter and one of its moons, Io, with a telescope, and noting discrepancies in the apparent period of Io's orbit, Rømer calculated a speed of 227,000 kilometres per second (approximately 141,050 miles per second).
		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.
	www.silverstar777.bravehost.com /page1.htm (313 words)

	Die Forschungspraxis Hippolyte Fizeaus
		Fizeaus gescheitertes Aetherwindexperiment wurde dann in den Kontext von Fizeaus aeusserst dichter Forschungsphase von 1845 bis 1852 gestellt, fuer die das Verhaeltnis zwischen Theorie und Experiment, der Umgang mit der Oeffentlichkeit und die Rolle der Technik in den Experimenten rekonstruiert wurden.
		Fizeau had assumed a small anisotropy of heat radiation when the apparatus is in motion, but the measuring accuracy that was necessary in order to investigate this effect could not quite be reached.
		Fizeau's failed experiment was put into the context of his extremely dense research period from 1845 to 1852.
	www.physik.uni-oldenburg.de /docserver/diss/metadocs/200207815321.html (378 words)

	Hippolyte Fizeau -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-21)
		Armand Hippolyte Louis Fizeau (September 23, 1819-1896), (The Romance language spoken in France and in countries colonized by France) French (A scientist trained in physics) physicist, was born in (The capital and largest city of France; and international center of culture and commerce) Paris.
		His earliest work was concerned with improvements in photographic processes; and then, in association with (Click link for more info and facts about J. Foucault) J.
		He became a member of the (Click link for more info and facts about Académie française) Académie française in 1860 and of the Bureau des Longitudes in 1878.
	www.absoluteastronomy.com /encyclopedia/H/Hi/Hippolyte_Fizeau.htm (276 words)

	Creativity and Technology in Experimentation: Fizeau's Terrestrial Determination of the Speed of Light
		Hippolyte Fizeau was the first to measure the speed of light in 1849 over a terrestrial distance, substituting lengthy astronomical observations with a sophisticated set of apparatus.
		I will argue that Fizeau employed two substantially different ways of implementing his experimental ideas, leading to an apparatus which allows quite precise determinations if appropriate measuring methods are invented to cope with difficulties.
		The replication and the consideration of the scientific context suggest a new appraisal of Fizeau's results, his intentions, and the reasons for starting the experiment in the first place.
	www.uni-oldenburg.de /histodid/publikationen/histodid65.html (211 words)

	A History of Photography, by Robert Leggat: FIZEAU, Armand Hippolyte (Site not responding. Last check: 2007-10-21)
		One of the disadvantages of the Daguerreotype was that it was extremely delicate, consisting of small particles of soft silver- mercury amalgam on the plate, which could be ruined simply by touching the surface.
		However in August 1840 Fizeau, a French physicist, published a method of toning the daguerreotype, which in addition to increasing the contrast, made the image stronger.
		In 1845 Fizeau also took the first pictures of the sun, on daguerreotypes.
	www.rleggat.com /photohistory/history/fizeau.htm (108 words)

	Terrestrial determinations.
		One innovation was to replace the second person by a fixed flat mirror whose surface is perpendicular to the beam of light from the source.
		Rather than measure time between uncovering and covering, Fizeau could measure the minimum speed that the screen must travel in order to cover the source at the exact time the light returns.
		The speed of rotation, coupled with the distance travelled (twice 8,633 metres in Fizeau's setup), could be transformed into a measure of the speed of light.
	www.stats.uwaterloo.ca /~rwoldfor/papers/sci-method/paperrev/node23.html (541 words)

	Early Photographic Techniques Collection
		Fizeau, Hippolyte Louis: Untitled [Church?]; Fizeau process from daguerreotype; ca.
		Fizeau, Hippolyte Louis: Untitled [Monument?]; Fizeau process from daguerreotype; ca.
		Fizeau, Hippolyte Louis: Untitled [Religious scene?]; Fizeau process from daguerreotype; ca.
	libweb.princeton.edu /libraries/firestone/rbsc/aids/gc137.html (184 words)

	DEES Research Project: Fizeau Historic Evaluation
		Fizeau (pronounced Fizz-oh) was a nuclear device detonated on the Nevada Test Site on September 14, 1957.
		It was named after the French physicist, Armand-Hippolyte-Louis Fizeau — the first scientist to determine experimentally the velocity of light.
		Instrumentation for the test included numerous data collectors to determine yield and performance.
	www.dees.dri.edu /Projects/wj_fizeau.htm (318 words)

	Hiyppolyte Fizeau (Site not responding. Last check: 2007-10-21)
		Fizeau wurde am 23.September 1819 in Paris geboren und starb am 18.Spetember 1896 in Venteuil.
		Francois Arago hatte 1838 vorgeschlagen, die Lichtgeschwindigkeit terrestrisch zu messen; die Ausführung gelang 1848 Fizeau mit einem rotierenden Zahnrad.
		1851 und wieder 1859 bestimmte Fizeau die Lichtgeschwindigkeit in strömendem Wasser und bestätigte damit den Fresnelschen Mitführungskoeffizienten (teilweise Mitführung des Äthers bei der Bewegung).
	www.chemie.uni-bremen.de /stohrer/biograph/fizeau.htm (112 words)

	CATHOLIC ENCYCLOPEDIA: Armand-Hippolyte-Louis Fizeau
		Just as they were ready to develop the experimentum crucis (see FOUCAULT) overthrowing the emission theory, they parted company and worked independently.
		Fizeau was the first to determine experimentally the velocity of light (1849).
		He used a rotating cogwheel and a fixed mirror several miles distant; light passed between two teeth of the wheel to the distant mirror and then returned.
	www.newadvent.org /cathen/06088b.htm (522 words)

	The Hutchinson Dictionary of Scientific Biography: Fizeau, Armand Hippolyte Louis (1819-1896)@ HighBeam Research (Site not responding. Last check: 2007-10-21)
		The Hutchinson Dictionary of Scientific Biography: Fizeau, Armand Hippolyte Louis (1819-1896)@ HighBeam Research
		Fizeau was born in Paris on 23 September 1819 into a wealthy family.
		He began to study medicine, his father being Professor of Pathology at the Paris Faculty of Medicine, but was forced to abandon his medical...
	www.highbeam.com /library/doc0.asp?DOCID=1P1:28910580&refid=ip_encyclopedia_hf (187 words)

	Fizeau, Armand-Hippolyte-Louis -- Britannica Student Encyclopedia
		Unaware of Christian Doppler's publication (1842), Fizeau in 1848 gave an explanation of the shift…
		"Fizeau, Armand-Hippolyte-Louis." Britannica Student Encyclopedia from Encyclopædia Britannica Premium Service.
		More results on "Fizeau, Armand-Hippolyte-Louis" when you join.
	www.britannica.com /ebi/article-9034454 (701 words)

	AllRefer.com - Armand Hippolyte Louis Fizeau (Physics, Biography) - Encyclopedia
		AllRefer.com - Armand Hippolyte Louis Fizeau (Physics, Biography) - Encyclopedia
		Armand Hippolyte Louis Fizeau[ArmAN´ EpOlEt´ lwE fEzO´] Pronunciation Key, 1819–96, French physicist.
		The first to measure (1849) the velocity of light in air, he also determined its speed in water.
	reference.allrefer.com /encyclopedia/F/Fizeau-A.html (181 words)

	MSN Encarta - Search Results - Fizeau Armand Hippolyte Louis (Site not responding. Last check: 2007-10-21)
		MSN Encarta - Search Results - Fizeau Armand Hippolyte Louis
		The speed of light was first measured in a laboratory experiment by the French physicist Armand Hippolyte Louis Fizeau, although earlier astronomical...
		Get more results for "Fizeau Armand Hippolyte Louis"
	uk.encarta.msn.com /Fizeau_Armand_Hippolyte_Louis.html (102 words)

	Natur des Lichts (Site not responding. Last check: 2007-10-21)
		Hippolyte Fizeau (1819 - 1896) wurde am 23.September 1819 in Paris geboren.
		1848 gelang Fizeau die terrestrische Messung der Lichtgeschwindigkeit.
		Die damals gemessene Lichtgeschwindigkeit lag allerdings noch etwa 5% zu hoch.
	members.aol.com /mblicht1/fizeau.htm (149 words)

	Speed of Light (Site not responding. Last check: 2007-10-21)
		" The first measurement of c on Earth was by Armand Fizeau in 1849.
		He used a beam of light reflected from a mirror 8km away.
		Actually bouncing a laser beam off the NJ's High Point Monument on a warm summer night is quite an attractive thought.
	www.njsas.org /projects/speed_of_light/fizeau (96 words)

	Armand Hippolyte Louis Fizeau History Summary (Site not responding. Last check: 2007-10-21)
		French physicist who in 1849 was the first to measure the speed of light on Earth.
		Fizeau was also the first to use the Doppler principle to measure the speed of stars moving toward or away from the observer.
		This principle is still used quite extensively in astronomy to measure the velocity of galaxies, the motion of gas swirling into fl holes, and the expansion of the universe.
	www.bookrags.com /history/sciencehistory/armand-hippolyte-louis-fizeau-scit-0512345 (102 words)

	ARMAND HIPPOLYTE LOUIS FIZEAU - LoveToKnow Article on ARMAND HIPPOLYTE LOUIS FIZEAU
		ARMAND HIPPOLYTE LOUIS FIZEAU - LoveToKnow Article on ARMAND HIPPOLYTE LOUIS FIZEAU
		He became a member of the French Academy in 1860 and of the Bureau des Longitudes in 1878.
		To properly cite this ARMAND HIPPOLYTE LOUIS FIZEAU article in your work, copy the complete reference below:
	www.1911encyclopedia.org /F/FI/FIZEAU_ARMAND_HIPPOLYTE_LOUIS.htm (185 words)

	Fizeau, Armand Hippolyte Louis on Encyclopedia.com (Site not responding. Last check: 2007-10-21)
		With Léon Foucault he took the first clear photograph of the surface of the sun.
		Magazines and Newspapers for: Fizeau, Armand Hippolyte Louis
		Pictures and Maps for: Fizeau, Armand Hippolyte Louis
	www.encyclopedia.com /html/F/Fizeau-A1.asp (120 words)

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