Léon Foucault - Revision history

PierreR at 22:32, 5 December 2015

2015-12-05T22:32:17Z

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	**http://www.speed-light.info/measurement.htm		**http://www.speed-light.info/measurement.htm

	~~===External links===~~
	~~http://www-rohan.sdsu.edu/~aty/explain/optics/refr.html~~

	~~http://ocw.mit.edu/courses/mechanical-engineering/2-71-optics-spring-2009/video-lectures/lecture-2-reflection-and-refraction-prisms-waveguides-and-dispersion/MIT2_71S09_lec02.pdf~~

	==References==		==References==

PierreR at 22:31, 5 December 2015

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	== See also ==		== See also ==
			*Foucault's Pendulum
	*~~[[Color Light Wave]]~~		**http://www.animations.physics.unsw.edu.au/jw/foucault_pendulum.html
	*~~[[Wave~~-~~Particle Duality]]~~		**http://www.geophysik.uni-muenchen.de/outreach/foucault-pendulum
			*Foucault-Fizeau Apparatus
			**http://www.speed-light.info/measurement.htm

	===External links===		===External links===

PierreR at 20:34, 4 December 2015

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	=== Measurement of the speed of light ===		=== Measurement of the speed of light ===
			[[File:solfoucault.jpg\|thumb\|300px\|The Fouault-Fizeau Experiment]]
	Working with Fizeau, Foucault designed a system to accurately measure the speed of light. Using a laser as a light source, beam was fired at a continuously rotating mirror, deflected to a second stationary mirror, back to the rotating mirror, and to the location of the laser. By measuring the distance from the projected beam from the source, and taking into account the distances involved along with the rate of rotation of the mirror, Foucault was able to predict the speed of light to be 298000 km/s, only 0.6% off from the modern accepted value for the speed of light.		Working with Fizeau, Foucault designed a system to accurately measure the speed of light. Using a laser as a light source, beam was fired at a continuously rotating mirror, deflected to a second stationary mirror, back to the rotating mirror, and to the location of the laser. By measuring the distance from the projected beam from the source, and taking into account the distances involved along with the rate of rotation of the mirror, Foucault was able to predict the speed of light to be 298000 km/s, only 0.6% off from the modern accepted value for the speed of light.

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	https://en.wikipedia.org/wiki/File:Foucault-rotz.gif		https://en.wikipedia.org/wiki/File:Foucault-rotz.gif

			http://www.daviddarling.info/encyclopedia/S/speedlight.html

	[[Category:Notable Scientists]]		[[Category:Notable Scientists]]

PierreR at 20:30, 4 December 2015

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	=== Measurement of the speed of light ===		=== Measurement of the speed of light ===

	Working with Fizeau		Working with Fizeau, Foucault designed a system to accurately measure the speed of light. Using a laser as a light source, beam was fired at a continuously rotating mirror, deflected to a second stationary mirror, back to the rotating mirror, and to the location of the laser. By measuring the distance from the projected beam from the source, and taking into account the distances involved along with the rate of rotation of the mirror, Foucault was able to predict the speed of light to be 298000 km/s, only 0.6% off from the modern accepted value for the speed of light.

	==Awards and Recognitions==		==Awards and Recognitions==

PierreR at 20:19, 4 December 2015

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	Born Jean Bernard Léon Foucault, Foucault was born on September 18, 1819 to a Parisian publisher. Due to his family's education and access to resources, Foucault was home schooled for the majority of his childhood, before leaving home to study medicine. He quickly discovered that due to his blood phobia, medicine was not the field for him. In order to continue academic pursuits Léon began studies in physics. Initially focusing on optics, Foucault worked on photographic processes, before becoming an assistant to [[Alfred Donné]], working with microscopic observation.		Born Jean Bernard Léon Foucault, Foucault was born on September 18, 1819 to a Parisian publisher. Due to his family's education and access to resources, Foucault was home schooled for the majority of his childhood, before leaving home to study medicine. He quickly discovered that due to his blood phobia, medicine was not the field for him. In order to continue academic pursuits Léon began studies in physics. Initially focusing on optics, Foucault worked on photographic processes, before becoming an assistant to [[Alfred Donné]], working with microscopic observation.

	After finishing his term with Alfred Donné, Léon partnered with [[Hippolyte Fizeau]] in order to study properties of visible light generated by the sun. In 1850 the two would conduct experiments detecting the speed of light through different mediums, effectively disproving Newton's theory of light, as well as determining the speed of light within 1% of the modern accepted value. His work with Pendulums would earn him further renown when, in 1851, he presented the Foucault pendulum, a simple experiment proving the rotation of the earth. The experiment' success and public appeal led Foucault to design a similar experiment with a device he would name the [[gyroscope]]. His work publicizing science, coupled with his work on light and optics would earn Foucault both the Royal Society's Copley award and a position at the Parisian Imperial Observatory in 1855.		After finishing his term with Alfred Donné, Léon partnered with [[Hippolyte Fizeau]] in order to study properties of visible light generated by the sun. In 1850 the two would conduct experiments detecting the speed of light through different mediums, effectively disproving Newton's theory of light, as well as determining the speed of light within 1% of the modern accepted value. His work with Pendulums would earn him further renown when, in 1851, he presented the Foucault pendulum, a simple experiment proving the rotation of the earth. The experiment' success and public appeal led Foucault to design a similar experiment with a device he would name the [[gyroscope]]. His work publicizing science, coupled with his work on light and optics would earn Foucault both the [[Royal Society]]'s Copley award and a position at the Parisian Imperial Observatory in 1855.

	At the Imperial Observatory Foucault would begin work studying magnets, eventually studying eddy currents, before returning to the field of optics. After designing a device to safely view the sun through a telescope, Foucault designed a method of testing the shape of mirrors in telescopes. IN his final years, Foucault returned to the Roman Catholic church, and later passed away due to multiple sclerosis on February 11, 1868.		At the Imperial Observatory Foucault would begin work studying magnets, eventually studying eddy currents, before returning to the field of optics. After designing a device to safely view the sun through a telescope, Foucault designed a method of testing the shape of mirrors in telescopes. IN his final years, Foucault returned to the Roman Catholic church, and later passed away due to multiple sclerosis on February 11, 1868.
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	*Copley Medal		*Copley Medal
	*Member of the Royal Society		*Member of the Royal Society
	*Member of the Bureau des Longitudes		*Member of the [[Bureau des Longitudes]]
	*Name Inscribed in the Eiffel Tower		*Name Inscribed in the Eiffel Tower
	*Officer in the Legion of Honour		*Officer in the [[Legion of Honour]]
	*Asteroid 5668 Foucault named in his honor		*Asteroid [[5668 Foucault]] named in his honor

	== See also ==		== See also ==

PierreR at 20:18, 4 December 2015

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	http://www.famousscientists.org/leon-foucault/		http://www.famousscientists.org/leon-foucault/

			https://en.wikipedia.org/wiki/File:Foucault-rotz.gif

	[[Category:Notable Scientists]]		[[Category:Notable Scientists]]

PierreR at 20:17, 4 December 2015

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	=== Foucault's Pendulum ===		=== Foucault's Pendulum ===
			[[File:pendulumfree.gif\|thumb\|300px\|Foucault's Pendulum in action]]
			Foucault's Pendulum is based on the premise that a free floating pendulum set in motion will maintain it's path in space with respect to the axis it rotates about. The design consists of a long pendulum fixed only in the z direction at the pivot, with large weight at the bottom. Once set in motion the pendulum would maintain it's plane of motion with respect to the top and bottom of the z-axis, the pivot and core of earth respectively. Tracing the path of the pendulum along the ground below it, however, will show, every except at the equator, a non linear path, indicating that the surface was rotating with respect to the plane of action of the pendulum.

	=== Measurement of the speed of light ===		=== Measurement of the speed of light ===

	*The Index of Refraction: the ratio of the speed of light through a vacuum to the speed of light in the medium. Written as: <math>n=\frac{c}{v}</math>, where		Working with Fizeau
	**c=speed of light in a vacuum
	**v=speed of light in medium
	~~Note that the index of refraction can never be less than one, since <math>\frac{c}{c}=1</math>.~~
	*Snell's Law: size of the angle of refraction, or how much the light bends. Written as:<math>n_1\sin\theta_1=n_2\sin\theta_2</math>, where
	**<math>n_1</math>=index of refraction of medium 1
	**<math>n_2</math>=index of refraction of medium 2
	**<math>\theta_1</math>=angle of incidence
	**<math>\theta_2</math>=angle of refraction.

	==Awards and Recognitions==		==Awards and Recognitions==
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	*Name Inscribed in the Eiffel Tower		*Name Inscribed in the Eiffel Tower
	*Officer in the Legion of Honour		*Officer in the Legion of Honour
	* Asteroid 5668 Foucault named in his honor		*Asteroid 5668 Foucault named in his honor

	== See also ==		== See also ==
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	==References==		==References==
	~~https~~://en.~~wikipedia~~.~~org~~/~~wiki~~/~~Refracting_telescope~~		http://www-history.mcs.st-andrews.ac.uk/Biographies/Foucault.html

	http://www~~-rohan~~.~~sdsu~~.~~edu~~/~~~aty~~/~~explain/optics/refr.html~~		http://www.famousscientists.org/leon-foucault/

	[[Category:~~Optics~~]]		[[Category:Notable Scientists]]

PierreR at 19:57, 4 December 2015

2015-12-04T19:57:46Z

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	==Awards and Recognitions==		==Awards and Recognitions==
			*Copley Medal
			*Member of the Royal Society
			*Member of the Bureau des Longitudes
			*Name Inscribed in the Eiffel Tower
			*Officer in the Legion of Honour
			* Asteroid 5668 Foucault named in his honor

	== See also ==		== See also ==

PierreR at 19:55, 4 December 2015

2015-12-04T19:55:38Z

← Older revision		Revision as of 15:55, 4 December 2015
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	After finishing his term with Alfred Donné, Léon partnered with [[Hippolyte Fizeau]] in order to study properties of visible light generated by the sun. In 1850 the two would conduct experiments detecting the speed of light through different mediums, effectively disproving Newton's theory of light, as well as determining the speed of light within 1% of the modern accepted value. His work with Pendulums would earn him further renown when, in 1851, he presented the Foucault pendulum, a simple experiment proving the rotation of the earth. The experiment' success and public appeal led Foucault to design a similar experiment with a device he would name the [[gyroscope]]. His work publicizing science, coupled with his work on light and optics would earn Foucault both the Royal Society's Copley award and a position at the Parisian Imperial Observatory in 1855.		After finishing his term with Alfred Donné, Léon partnered with [[Hippolyte Fizeau]] in order to study properties of visible light generated by the sun. In 1850 the two would conduct experiments detecting the speed of light through different mediums, effectively disproving Newton's theory of light, as well as determining the speed of light within 1% of the modern accepted value. His work with Pendulums would earn him further renown when, in 1851, he presented the Foucault pendulum, a simple experiment proving the rotation of the earth. The experiment' success and public appeal led Foucault to design a similar experiment with a device he would name the [[gyroscope]]. His work publicizing science, coupled with his work on light and optics would earn Foucault both the Royal Society's Copley award and a position at the Parisian Imperial Observatory in 1855.

			At the Imperial Observatory Foucault would begin work studying magnets, eventually studying eddy currents, before returning to the field of optics. After designing a device to safely view the sun through a telescope, Foucault designed a method of testing the shape of mirrors in telescopes. IN his final years, Foucault returned to the Roman Catholic church, and later passed away due to multiple sclerosis on February 11, 1868.
	==Notable works==		==Notable works==

PierreR at 19:48, 4 December 2015

2015-12-04T19:48:08Z

← Older revision		Revision as of 15:48, 4 December 2015
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	Born Jean Bernard Léon Foucault, Foucault was born on September 18, 1819 to a Parisian publisher. Due to his family's education and access to resources, Foucault was home schooled for the majority of his childhood, before leaving home to study medicine. He quickly discovered that due to his blood phobia, medicine was not the field for him. In order to continue academic pursuits Léon began studies in physics. Initially focusing on optics, Foucault worked on photographic processes, before becoming an assistant to [[Alfred Donné]], working with microscopic observation.		Born Jean Bernard Léon Foucault, Foucault was born on September 18, 1819 to a Parisian publisher. Due to his family's education and access to resources, Foucault was home schooled for the majority of his childhood, before leaving home to study medicine. He quickly discovered that due to his blood phobia, medicine was not the field for him. In order to continue academic pursuits Léon began studies in physics. Initially focusing on optics, Foucault worked on photographic processes, before becoming an assistant to [[Alfred Donné]], working with microscopic observation.

	After finishing his term with Alfred Donné, Léon partnered with [[Hippolyte Fizeau]] in order to study properties of visible light generated by the sun. In 1850 the two would conduct experiments detecting the speed of light through different mediums, effectively disproving Newton's theory of light, as well as determining the speed of light within 1% of the modern accepted value.		After finishing his term with Alfred Donné, Léon partnered with [[Hippolyte Fizeau]] in order to study properties of visible light generated by the sun. In 1850 the two would conduct experiments detecting the speed of light through different mediums, effectively disproving Newton's theory of light, as well as determining the speed of light within 1% of the modern accepted value. His work with Pendulums would earn him further renown when, in 1851, he presented the Foucault pendulum, a simple experiment proving the rotation of the earth. The experiment' success and public appeal led Foucault to design a similar experiment with a device he would name the [[gyroscope]]. His work publicizing science, coupled with his work on light and optics would earn Foucault both the Royal Society's Copley award and a position at the Parisian Imperial Observatory in 1855.
	==Notable works==		==Notable works==