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'''Léon Nicolas Brillouin''' (French: [bʁilwɛ̃]; August 7, 1889 – October 4, 1969) was a French physicist.

He made contributions to quantum mechanics, radio wave propagation in the atmosphere, [[solid state physics]], and [[information theory]].

Brillouin was a founder of modern solid state physics for which he discovered or predicted, among other things, [[Brillouin|Brillouin zones]] and [[Brillouin scattering]].

He applied information theory to physics and the design of computers and coined the concept of [[negentropy]] to demonstrate the similarity between [[entropy]] and [[information]].

Brillouin offered a solution to the problem of [[Maxwell's demon]]. In his book, ''[[Relativity Reexamined]]'', he called for a "painful and complete re-appraisal" of relativity theory which "is now absolutely necessary."

== See also ==

* [[Brillouin scattering]]
* [[Brillouin zone]]
* [[Negentropy]]

== External links ==

* [https://en.wikipedia.org/wiki/L%C3%A9on_Brillouin Léon Brillouin] @ Wikipedia


[[Category:Information theory]]
[[Category:People]]
[[Category:Physicists]]