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Jean Baptiste Biot Biography
Jean Baptiste Biot (April 21, 1774, Paris February 3, 1862, Paris) was a French physicist and mathematician who in the early 1800s studied the relationship between electrical current and magnetism (see Biot-Savart's Law), as well as the polarisation of light passing through chemical solutions.

He was the first person to discover the unique optical properties of mica, and therefore the mica-based mineral biotite was named after him.

In 1804 he made a hot-air balloon ascent with Joseph Gay-Lussac to a height of five kilometres in an early investigation of the Earth's atmosphere.
 
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article Jean Baptiste Biot.