Jean-Baptiste Biot (April 21, 1774, Paris – February 3, 1862, Paris) was a Frenchphysicist and mathematician who in the early 1800s studied the relationship between electrical current and magnetism (see Biot-Savart Law), as well as the polarisation of light passing through chemical solutions. This image is in the public domain because its copyright has expired in the United States and those countries with a copyright term of life of the author plus 100 years. ... April 21 is the 111th day of the year in the Gregorian calendar (112th in leap years). ... 1774 was a common year starting on Saturday (see link for calendar). ... The Eiffel Tower has become a symbol of Paris throughout the world. ... February 3 is the 34th day of the year in the Gregorian Calendar. ... 1862 was a common year starting on Wednesday (see link for calendar). ... The Eiffel Tower has become a symbol of Paris throughout the world. ... The word physicist should not be confused with physician, which means medical doctor. ... A mathematician is a person whose area of study and research is mathematics. ... Events and Trends Beginning of the Napoleonic Wars (1803 - 1815). ... The Biot-Savart Law describes the magnetic field set up by a steadily flowing line current: the field produced by a current element is where is the magnetic constant I is the current, measured in amperes is the unit displacement vector from the element to the field point For a... This article treats polarization in electrodynamics. ...
He was the first person to discover the unique optical properties of mica, and therefore the mica-based mineral biotite was named after him. rock with mica Mica sheet mica flakes The mica group of minerals includes several closely related materials having highly perfect basal cleavage. ... A Biotite slice Biotite is a common silicate mineral that contains potassium, magnesium, iron and aluminium. ...
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. 1804 was a leap year starting on Sunday (see link for calendar). ... Hot air balloons are the oldest successful human flight technology, dating back to the Montgolfier brothers invention in Annonay, France in 1783. ... Joseph-Louis Gay-Lussac (December 6, 1778–May 10, 1850) was a French chemist and physicist. ... Earths atmosphere is the layer of gases surrounding the planet Earth and retained by the Earths gravity. ...
There is a small crater on the Moon that is named for him. Biot is a small, bowl-shaped lunar crater located in the southern reaches of the Mare Fecunditatis. ... Crust composition Oxygen 43% Silicon 21% Aluminium 10% Calcium 9% Iron 9% Magnesium 5% Titanium 2% Nickel 0. ...
Biot was actively engaged in the various branches of the geodetic work involved in the famous measurement of the quadrant of a meridian, for the purpose of standardizing the length of the new unit, the meter.
As a member of the Bureau of Longitudes he went, in 1806, with young Arago, to Formentera, in the Balearic Islands, to resume the measurement of a degree of the meridian, interrupted by the death of Mechian.
Biot discovered the laws of rotary polarization by crystalline bodies and applied these laws to the analysis of saccharine solutions.
Biot venait de terminer son premier travail, portant sur les équations aux différences mêlées, c'est-à-dire sur une catégorie de relations analytiques où entrent à la fois des différentielles ordinaires et des différences finies, sujet qui avait fait autrefois l'objet de quelques tentatives d'Euler.
Biot fait son enquête avec un soin extrême, rapprochant les témoignages de toute nature qu'il a pu recueillir.
Biot a dépensé de grands efforts pour développer une théorie mathématique de la lumière en partant des idées newtoniennes sur les molécules lumineuses.
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