1786 – Arago – bio

Francoise Arago was born in 1786 in France and was an astronomer, physicist and mathematician. Some of his work complemented similar work by Faraday and Fresnel. His confirmation of a bright spot of light at the center of a circular shadow helped confirm Fresnel’s wave theory of light and is now known as “Arago’s spot”. He discovered the rotary polarization of light and invented the first polarization filter. Arago assembled the first working electromagnet, which was later improved by Sturgeon and Henry. He studied the compression and dispersion of gases, theorized about measuring the speed of light and discovered the solar chromosphere.

PRECURSOR:
1401 – Nicholas of Cusa
1601 – Fermat
1642 – Newton
1707 – Euler
1736 – Lagrange
1749 – Laplace

CONCURRENT:
1774 – Biot
1777 – Oersted
1781 – Poisson
1783 – Sturgeon
1788 – Fresnel
1791 – Faraday
1799 – Henry

SUBSEQUENT:
1819 – Foucault
1831 – Maxwell

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