[fruh-nel, French frey-nel]
- a unit of frequency, equal to 1012 cycles per second.
Origin of fresnel
First recorded in 1935–40; named after Augustin Jean Fresnel
[fruh-nel; French frey-nel]
- Augustin Jean,1788–1827, French physicist.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for fresnel
Fresnel dipped a hand into his pocket, and fetched thence a key.Scaramouche
Fresnel, Oppert, and Thomas, were included in the same disaster.A History of Art in Chalda & Assyria, v. 1
The light-house has since been rebuilt, and shows a Fresnel light.Cape Cod
Henry D. Thoreau
Fresnel therefore adopted the ingenious device proposed by Condorcet, that of constructing a lens of a number of distinct pieces.
But for lenses the burner has seventeen films of flame, and is said to possess six times the power of the Fresnel lamp.
- a unit of frequency equivalent to 10 12 hertz
C20: named after Augustin Jean Fresnel (1788–1827), French physicist
- Augustin Jean (oɡystɛ̃ ʒɑ̃). 1788–1827, French physicist: worked on the interference of light, contributing to the wave theory of light
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- 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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