Léon N Brillouin - Revision history

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	\| birth_date = {{birth date\|1889\|08\|07\|mf=y}}		\| birth_date = {{birth date\|1889\|08\|07\|mf=y}}
	\| death_date = {{death date\|1969\|10\|01\|~~mf=y~~}}		\| death_date = {{death date and age\|1969\|10\|1\|1889\|8\|7}}
	\| fields = [[Physicist]]		\| fields = [[Physicist]]
	\| residence = New York, NY, United States		\| residence = New York, NY, United States

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	\| birth_date = {{birth date\|1889\|08\|07\|mf=y}}		\| birth_date = {{birth date\|1889\|08\|07\|mf=y}}
	\| death_date = {{~~birth~~ date\|1969\|10\|01\|mf=y}}		\| death_date = {{death date\|1969\|10\|01\|mf=y}}
	\| fields = [[Physicist]]		\| fields = [[Physicist]]
	\| residence = New York, NY, United States		\| residence = New York, NY, United States

ClaudeBot: ClaudeBot moved page L?on N Brillouin to Léon N Brillouin: Restore accented characters in scientist name (per-item verified; source: de Climont directory / known scientist)

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ClaudeBot moved page L?on N Brillouin to Léon N Brillouin: Restore accented characters in scientist name (per-item verified; source: de Climont directory / known scientist)

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	[[Category:Relativity]]		[[Category:Relativity\|Brillouin L?on]]

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	* 1970 - "[[Relativity Reexamined]]" ([http://www.amazon.com/Relativity-Re-examined-Leon-Brillouin/dp/0121349454/ref=sr_1_2?ie=UTF8&s=books&qid=1219331173&sr=1-2 Read in full])		* 1970 - "[[Relativity Reexamined]]" ([http://www.amazon.com/Relativity-Re-examined-Leon-Brillouin/dp/0121349454/ref=sr_1_2?ie=UTF8&s=books&qid=1219331173&sr=1-2 Read in full])

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	[[Category:Relativity]]		[[Category:Relativity]]

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{{Infobox scientist
| name = L?on N. Brillouin
| image = L?on N Brillouin 458.jpg
| alt = L?on N. Brillouin
| birth_date = {{birth date|1889|08|07|mf=y}}
| death_date = {{birth date|1969|10|01|mf=y}}
| fields = [[Physicist]]
| residence = New York, NY, United States
| nationality = French
| known_for = [[Relativity]]
}}

'''L?on Nicolas Brillouin''' was a [http://en.wikipedia.org/wiki/France French] physicist. He was born in [http://en.wikipedia.org/wiki/S%C3%A8vres S?vres] (near [http://en.wikipedia.org/wiki/Paris Paris]), [http://en.wikipedia.org/wiki/France France]. His father, [http://en.wikipedia.org/wiki/Marcel_Brillouin Marcel Brillouin], was a physicist as well. He made contributions to [http://en.wikipedia.org/wiki/Quantum_mechanics quantum mechanics], radio wave propagation in the atmosphere, solid state physics, and [http://en.wikipedia.org/wiki/Information_theory information theory].

Brillouin was a founder of modern [http://en.wikipedia.org/wiki/Solid_state_physics solid state physics] for which he discovered, among other things, [http://en.wikipedia.org/wiki/Brillouin_zone Brillouin zones]. He applied [http://en.wikipedia.org/wiki/Information_theory information theory] to physics and the design of computers and coined the concept of [http://en.wikipedia.org/wiki/Negentropy Negentropy] to demonstrate the similarity between entropy and information. Brillouin offered a solution to the problem of [http://en.wikipedia.org/wiki/Maxwell%27s_demon Maxwell?s demon]. In his book, ''Relativity Reexamined'', he called for a "painful and complete re-appraisal" of [http://en.wikipedia.org/wiki/Relativity_theory relativity theory] which "is now absolutely necessary." - <em>Wikipedia</em>

 

French-American physicist and son of [http://scienceworld.wolfram.com/biography/BrillouinMarcel.html Marcel Brillouin] (1854-1948) and Charlotte Mascart, who was herself the daughter of E. Mascart (1837-1908), a well-known French physicist of the 19th century. L?on Brillouin was educated at the ?cole Normale Sup?rieure (1908-1912), as was his father before him. He was professor at the Sorbonne (1928), and subsequently professor at the College de France (1932-1949), again following his father?s footsteps.

During the war, L?on Brillouin emigrated to the United States, where he became a professor at the University of Wisconsin (1941) and Harvard (1946). He became an American citizen in 1949, was appointed director of Electronic Education at IBM (1948-53), and was elected a member of the National Academy of Sciences in 1953. From 1953 to his death in 1969, he was a professor at Columbia University in New York City.

L?on Brillouin specialized in [http://scienceworld.wolfram.com/physics/QuantumMechanics.html quantum mechanics], <img height="12" alt="Eric Weisstein?s World of Physics" width="12" src="http://scienceworld.wolfram.com/images/crossrefs/physics.gif" /> and developed the BWK method of approximating solutions to the [http://scienceworld.wolfram.com/physics/SchroedingerEquation.html Schr?dinger equation] <img height="12" alt="Eric Weisstein?s World of Physics" width="12" src="http://scienceworld.wolfram.com/images/crossrefs/physics.gif" /> in 1926. He discovered the famous "[http://scienceworld.wolfram.com/physics/BrillouinZone.html Brillouin zones] <img height="12" alt="Eric Weisstein?s World of Physics" width="12" src="http://scienceworld.wolfram.com/images/crossrefs/physics.gif" />" of solid state physics, which are named in his honor. During his career, he authored more than 200 papers (his biography lists 212 of them) and about 15 books. - [http://scienceworld.wolfram.com/biography/BrillouinLeon.html http://scienceworld.wolfram.com/biography/BrillouinLeon.html]

==Books==

* 1970 - "[[Relativity Reexamined]]" ([http://www.amazon.com/Relativity-Re-examined-Leon-Brillouin/dp/0121349454/ref=sr_1_2?ie=UTF8&s=books&qid=1219331173&sr=1-2 Read in full])

[[Category:Scientist]]
[[Category:Relativity]]