nurâné tonok, nurikâné ~
Fr.: optiquement mince
The qualifier of a medium in which the → optical depth is large, significantly smaller than 1.
optically violent variable (OVV) quasar
kuâsâr-e vartande-ye nurâné surâ
Fr.: quasar variable optiquement violent
A member of a small subset of quasars consisting of bright radio galaxies whose flux of visible light output can vary by as much as 50% in a single day.
1) eynak-sâz; 2) nurikâr, nurik-kâr
1) A maker or seller of optical glass.
From Fr. opticien, from M.L. optic(a), → optics, + -ien "-ian."
1) Eynak-sâz "eyeglass maker," from eynak→ eyeglasses + sâz agent noun of
"to build, make, fashion; to adapt, adjust, be fit" (from
Mid.Pers. sâxtan, sâz-, Manichean Parthian s'c'dn "to prepare,
to form;" Av. sak- "to understand, to mark,"
sâcaya- (causative) "to teach").
The branch of physics that deals with the properties and phenomena of electromagnetic radiation in the wavelength range extending from the ultraviolet (at about 40 nm) to the far-infrared (at 1 mm) and with vision.
Optics, from optic, from M.Fr. optique, from M.L. opticus "of sight or seeing," from Gk. optikos "of or having to do with sight," from optos "seen, visible," from op-, root of opsesthai "be going to see," related to ops "eye," from PIE *okw- "eye; to see" (→ eye); → -ics.
Fr.: optique physique
The branch of optics concerned with the wave properties of light, → diffraction, → polarization, and other phenomena for which the ray approximation of → geometric optics is not valid. Also called → wave optics.
In general, pertaining to or affording an overall view.
M.L. synopticus, from Gk. synoptikos, from synop-, → synopsis, + -tikos.
Fr.: carte synoptique
1) Sun: A map that displays positions of certain events
(e.g., → sunspots, → faculae,
→ filaments, etc.) observed during one solar rotation.
Fr.: optique ondulatoire
The branch of optics that analyzes the electromagnetic radiation in terms of its wave characteristics. Also called → physical optics.