[fruh-nel; French frey-nel] /frəˈnɛl; French freɪˈnɛl/
Augustin Jean, 1788–1827, French physicist.
British Dictionary definitions for aj fresnel
fresnel (ˈfreɪnɛl, French frɛnɛl)
a unit of frequency equivalent to 1012 hertz
[C20: named after Augustin Jean Fresnel (1788--1827), French physicist]

Fresnel (French frɛnɛl)
Augustin Jean (oɡystɛ̃ ʒɑ̃). 1788--1827, French physicist: worked on the interference of light, contributing to the wave theory of light

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aj fresnel in Science
French physicist whose investigations of the interference, diffraction, and polarization of light helped establish the theory that light moves in a wavelike motion. Fresnel also made great contributions to the field of optics, including the development of a compound lens for use in lighthouses.
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