An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



<< < amb int pol pol > >>

Number of Results: 78 Search : polar
polarization degree
  درجه‌ی ِ قطبش   
daraje-ye qotbeš (#)

Fr.: degré de polarisation   

degree of polarization.

polarization; → degree.

polarization fraction
  برخه‌ی ِ قطبش   
barxe-ye qotbeš

Fr.: fraction de polarisation   

The ratio expressed by P = (Ipar - Iper) / (Ipar + Iper), where Ipar and Iper are the light intensities with the electric field vector respectively parallel and perpendicular to the incident beam.

polarization; → fraction.

qotbidan (#)

Fr.: polariser   

To cause → polarization. To undergo polarization.

Infinitive of → polarization.

qotbidé (#)

Fr.: polarisé   

Of or pertaining to a medium or physical phenomenon that exhibits → polarization.

P.p. of → polarize.

polarized light
  نور ِ قطبیده   
nur-e qotbidé (#)

Fr.: lumière polarisée   

Electromagnetic radiation in the optical region which has undergone → polarization.

Past participle of → polarize; → light.

qotbandé (#)

Fr.: polariseur   

An optical device capable of transforming natural light into polarized light, usually by selective transmission of polarized rays.

Agent noun of → polarize.

polarizing angle
  زاویه‌ی ِ قطبش   
zâviye-ye qotbeš (#)

Fr.: angle de polarisation   

The angle of → incidence for which the reflected light is completely polarized. Also called the → Brewster angle and → polarization angle. See also → Brewster's law.

Polarizing, adj. of → polarize; → angle.

polarizing filter
  پالایه‌ی ِ قطبنده   
pâlâye-ye qotbandé (#)

Fr.: filtre polarisant   

A filter that polarizes light passing through it.

Polarizing, adj. of → polarize; → filter.

polarizing prism
  منشور ِ قطبنده   
manšur-e qotbandé

Fr.: prisme polarisant   

A prism that is used to produce or analyze plane-polarized light.

Polarizing, adj. of → polarize; → prism.

  چهارقطبه، چهارقطبه‌ای   
cahârqotbé (#), cahârqotbe-yi (#)

Fr.: quadrupolaire   

Of or pertaining to a → quadrupole, especially a → quadrupole moment.

quadrupole + -ar, → -al.

South Polar Layered Deposits (SPLD)
  لردهای ِ لایه-لایه‌ی ِ قطب ِ دشتر   
Lerdhâ-ye Laye-laye-ye Qotb-e Daštar

Fr.: couches de dépôt du pôle sud   

A large area of the south polar region of → Mars which is covered with layers of → water ice and → dust. The SPLD, like the NPLD, has a maximum relief relative to the surrounding terrain of ~ 3.5 km and ~ 1,000 km across. Above the SPLD lies a very thin temporary (1-10 m) cap of → carbon dioxide ice/frost that snows out in the winter and sublimates over the spring and summer seasons. It is believed that the rhythmic nature of the deposits is related to oscillations in Mars' → orbital parameters (J. J. Plaut et al., 2007, Science 316, 92).

south; → polar; → layer; → deposit.

Spectro-Polarimetric High-contrast Exoplanet (SPHERE)

Fr.: Spectro-Polarimetric High-contrast Exoplanet (SPHERE)   

The → extreme adaptive optics system and → coronagraphic facility at the → European Southern Observatory (ESO) → Very Large Telescope (VLT) (UT3) available from May 2014. Its primary science goal is imaging, low-resolution spectroscopic, and polarimetric characterization of → exoplanetary system at → visible and → near-infrared wavelengths (0.5-2.32 μm). SPHERE is capable of obtaining → diffraction-limited images at 0''.02 to 0''.08 resolution depending on the wavelength. Its → spectral resolution is 30 to 350, depending on the mode.

spectro-; → polarimetric; → high; → contrast; → exoplanet.

  بیناب-قطبش‌سنجی، بیناب-قطبش‌سنجیک   
binâb-qotbešsanji, binâb-qotbešsanjik

Fr.: spectropoolarimétrique   

Of or relating to → spectropolarimetry.

spectropolarimetry; → -ic.


Fr.: spectropolarimétrie   

A technique of observation in → astrophysics which combines → spectroscopy and → polarization measurements. Spectropolarimetry has a wide range of applications in astrophysics, including → stellar magnetic field studies. → ESPaDOnS, → HARPSpol.

spectro-; → polarimetry.

spherical polar coordinate
  هماراهای ِ کره‌ای ِ قطبی   
hamârâhâ-ye kore-yi-ye qotbi

Fr.: coordonnées sphériques polaires   

Same as → spherical coordinates.

spherical; → polar; → coordinate

tangentially polarized light
  نور ِ قطبیده‌ی ِ سایانی   
nur-e qotbide-ye sâyâni

Fr.: lumière polarisée tangentiellement   

The → linearly polarized light that vibrates perpendicularly to an imaginary line joining the source to the point of observation.

Tangentially, adverb of → tangential; → polarized; → light.

unpolarized light
  نور ِ ناقطبیده   
nur-e nâqotbidé (#)

Fr.: lumière non polarisée   

A light whose electric vector of vibration is randomly oriented. Light is an → electromagnetic wave possessing an electric vector and an associated orthogonal magnetic vector. Both vectors are → transverse to the axis of propagation. In unpolarized light the electric and magnetic vibrations occur in all possible planes. Ordinary light emitted by the Sun, by a living room lamp, or by a candle flame is unpolarized light. → polarization.

un-; → polarized light.

vacuum polarization
  قطبش ِ خلاء   
qotbeš-e xala'

Fr.: polarisation du vide   

A quantum field theory a process in which an electromagnetic field gives rise to virtual electron-positron pairs that in turn exert electromagnetic fields of their own, in a manner similar to classical dielectric polarization.

vacuum; → polarization.

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