# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 33 Search : spectrum
 non-thermal spectrum   بیناب ِ ناگرمایی   binâb-e nâgarmâyiFr.: spectre non thermique   A radio emission with a negative → spectral index. In this type of emission the intensity of the emitted radiation increases with wavelength.→ non-thermal; → spectrum. Planck spectrum   بیناب ِ پلانک   binâb-e PlanckFr.: spectrum de Planck   Same as → blackbody spectrum.→ Planck; → spectrum. power spectrum   بیناب ِ توانی   binâb-e tavâni (#)Fr.: spectre de puissance   The plot that gives the portion of a signal's power falling within given frequency bins. The most common way of generating a power spectrum is by using a discrete Fourier transform.→ power; → spectrum. prismatic spectrum   بیناب ِ منشوری   binâb-e manšuriFr.: spectre prismatique   The spectrum formed by a dispersing prism or a dispersing prism system.Adj. of → prism + → spectrum. radiation spectrum   بیناب ِ تابش   binâb-e tâbešFr.: spectre de rayonnement   The components of radiation arranged in order of their wavelengths, frequencies, or quantum energies. For particle radiation they are arranged in order of their kinetic energies.→ radiation; → spectrum. radio spectrum   بیناب ِ رادیویی   binâb-e râdio-yiFr.: spectre radio   That part of the → electromagnetic spectrum that includes → radio waves.→ radio; → spectrum. Rayleigh-Jeans spectrum   بیناب ِ ریلی-جینز   binâb-e Rayleigh-JeansFr.: spectre Rayleigh-Jeans   The part of → electromagnetic spectrum approximated by the → Rayleigh-Jeans law.→ Rayleigh; → Jeans; → spectrum. rectified spectrum   بیناب ِ راستیده   binâb-e râstidéFr.: spectre rectifié   A spectrum after correction for detector's → baseline.Rectified p.p. of → rectify; → spectrum. rotation-vibration spectrum   بیناب ِ چرخش-شیوش   binâb-e carxeš-šivešFr.: spectre rotation-vibration   The spectrum of a molecule resulting from the simultaneous rotation and vibration of its constituent atoms.→ rotation; → vibration; → spectrum. solar spectrum   بیناب ِ خورشید، ~ خورشیدی   binâb-e xoršid (#), ~ xoršidi (#)Fr.: spectre solaire   The spectrum of the Sun's electromagnetic radiation, consisting of a continuum spectrum marked with dark absorption lines.→ solar; → spectrum. spark spectrum   بیناب ِ اخگر، ~ جرقه   binâb-e axgar, ~ jaraqéFr.: spectre d'étincelle   The emission spectrum produced through a gas or vapor as a result of a high-voltage discharge between metallic electrodes.→ spark; → spectrum. spectrum   بیناب   binâb (#)Fr.: spectre   The → electromagnetic radiation divided into its constituting wavelengths or frequencies.From L. spectrum "appearance, image, apparition," from specere "to look at, view;" Gk. skopein "to behold, look, consider," skeptesthai "to look at;" PIE base *spek- "to see;" cf. Av. spas-, spaš- "to attend to; to serve; spy," spasiieiti "looks at, perceives" (Mod.Pers. sepâs "kindness, favor, thanksgiving," sepâsidan "to praise for benefits received);" Skt. paś- "to see, watch," spasati "sees;" L. specere "to look at;" O.H.G. spehônn "to spy," Ger. spähen "to spy."Binâb "a vision;" Mid.Pers. wênâb "vision," from wên-, present stem of didan "to see;" O.Pers. vain- "to see;" Av. vaēn- "to see;" cf. Skt. veda "I know;" Gk. oida "I know," idein "to see;" L. videre "to see;" PIE base *weid- "to know, to see." visible spectrum   بیناب ِ دیار، ~ دیدنی   binâb-e diyâr, ~ didaniFr.: spectre visible   The portion of → electromagnetic spectrum corresponding to → visible light.→ visible; → spectrum.

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