[fruh-nel, French frey-nel] /frəˈnɛl, French freɪˈnɛl/
a unit of frequency, equal to 10 12 cycles per second.
[fruh-nel; French frey-nel] /frəˈnɛl; French freɪˈnɛl/
Augustin Jean, 1788–1827, French physicist.
/ˈfreɪnɛl; French frɛnɛl/
a unit of frequency equivalent to 1012 hertz
Augustin Jean (oɡystɛ̃ ʒɑ̃). 1788–1827, French physicist: worked on the interference of light, contributing to the wave theory of light
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.
noun, Optics. 1. .
noun 1. Optics. a large lens with a surface of concentric grooves of prismatic profile, used in automobile headlights, searchlights, spotlights, etc. noun 1. a lens consisting of a number of smaller lenses arranged to give a flat surface of short focal length Fresnel lens (frə-něl’) A thin optical lens consisting of concentric rings of […]
plural noun, Optics. 1. two plane mirrors joined together in a way that makes them useful for studying interference patterns.
[frez-noh] /ˈfrɛz noʊ/ noun 1. a city in central California. /ˈfrɛznəʊ/ noun 1. a city in central California, in the San Joaquin Valley. Pop: 451 455 (2003 est) Fresno [(frez-noh)] City in south-central California. Note: Center of a major agricultural area.