An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 8 Search : absorb
absorb
  درشمیدن   
daršamidan

Fr.: absorber   

1) General: To suck up or take up.
2) Physics: To retain → energy (radiation or sound, for example) or → matter wholly, without → reflection or → transmission.

M.Fr. absorber, from L. absorbere "to swallow up," from ab- "from" + sorbere "suck in;" PIE root *srebh- "to suck, absorb;" cf. Arm. arbi "I drank;" Gk. rhophein "to sup up, gulp down;" Lith. srebiu "to drink greedily;" Proto-Iranian *hrab- "to sip, suck (in)," cf. Pashto raw-, Shaghni râv-, Sariqoli rov-, Ishkashimi ruv- "to suck" (Cheung 2007), Pers. (prefixed) zâlu "leech."

Daršamidan, from daršam, from dar- "in, into" + šam, variant of šâm, as in âšâm, âšâmidan "to drink, to sip;" Av. šam- "to drink, sip, swallow;" Skt. cam, camati "to sip, drink, lick up, absorb."

absorbable
  درشمیدنی   
daršamidani

Fr.: absorbable   

Capable of being absorbed.

Absorbable, adj. from → absorb + → -able.

Daršamidani adj. from aršamidan "to absorb" + -i, → -able.

absorbance
  درشمندگی   
daršamandegi

Fr.: absorbance   

The ability of a solution or a layer of a substance to absorb → radiation, i.e. the ratio of the intensity of the light incident on the solution to the intensity transmitted by it, in logarithmic scale.

absorb; → -ance.

absorbent
  درشمنده   
daršamandé

Fr.: absorbant   

1) Any material or → substance that → absorbs.
2) Relating to or capable of → absorption.

Absorbent, from → absorb + -ent.

Daršamandé from aršam present stem of daršamidan, → absorb, + -andé suffix forming adj. and/or agent name.

absorber
  درشمگر   
daršamgar

Fr.: absorbeur   

Any medium that absorbs something.

absorb; → -er.

absorbing wedge
  گُوه‌ی ِ درشمنده   
gove-ye daršamandé

Fr.: coin absorbant   

Optics: A strip or annulus of material, such as glass or film, whose density increases progressively from one end to the other. The function of the wedge is to weaken the light beam in an optical system.

Verbal adj. from → absorb; → wedge.

cold absorber
  درشمگر ِ سرد   
daršamgar-e sard

Fr.: absorbeur froid   

A broad → absorption feature observed in → X-ray spectra of → active galactic nuclei (AGN). It is caused by material associated with the → interstellar medium in our → Galaxy and/or the host galaxy of the AGN or cold material near the AGN. → Quasars commonly have their X-ray spectrum absorbed by cold gas between us and the quasar X-ray source (along our → line of sight). This is particularly common in less luminous quasars. See also → warm absorber.

cold; → absorber.

warm absorber
  درشمگر ِ گرم   
daršamgar-e garm

Fr.: absorbeur chaud   

A cloud of ionized gas within → active galactic nuclei (AGN) that causes absorption at → soft X-ray wavelengths. Warm absorbers were first suggested by Halpern (1984) to explain Einstein data of the quasar MR 2251-178. They are dubbed "warm" absorbers as they imply gas at temperatures of 104-105 K; the gas is → photoionized, not collisionally ionized. High resolution observations of warm absorbers have shown that they are outfowing. See also → cold absorber (Ceri Ellen Ashton, 2005, A Study of Warm Absorbers in Active Galactic Nuclei, Thesis, Mullard Space Science Laboratory Department of Space and Climate Physics University College London ).

warm; → absorber.