An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 47 Search : radiation
radiationless relaxation
  واهلش ِ بی‌تابش   
vâhaleš-e bitâbeš

Fr.: relaxation sans rayonnement   

A process in which a molecule relaxes without emitting a → photon.

radiation; → -less; → relaxation.

recombination radiation
  تابش ِ بازمیازش   
tâbeš-e bâzmiyâzeš

Fr.: rayonnement de recombinaison   

Radiation produced when a free electron in a plasma is captured by an ionized atom.

recombination; → radiation.

solar radiation
  تابش ِ خورشیدی   
tâbeš-e xoršidi

Fr.: rayonnement solaire   

All the constituents making up the Sun's emission: photons, electrons, protons, neutrinos, and atomic nuclei.

solar; → radiation.

solar radiation pressure
  فشار ِ تابش ِ خورشید   
fešâr-e tâbeš xoršid (#)

Fr.: pression du rayonnement solaire   

The → radiation pressure of solar photons, which pushes a comet's dust outward to form a → dust tail.

solar; → radiation; → pressure.

submillimeter radiation
  تابش ِ زیر-میلیمتری   
tâbeš-e zir-milimetri

Fr.: rayonnement sub-millimétrique   

That part of the → electromagnetic radiation with a → wavelength beyond 300 → microns.

submillimeter; → radiation.

synchrotron radiation
  تابش ِ سنکروترون   
tâbeš-e sankrotron

Fr.: rayonnement synchrotron   

The electromagnetic radiation emitted by high-energy particles that are moving in magnetic fields, as in a synchrotron particle accelerator. The acceleration of the moving charges causes the particles to emit radiation. Radio galaxies and supernova remnants are intense sources of synchrotron radiation. Characteristics of synchrotron radiation are its high degree of polarization and nonthermal spectrum.

synchrotron; → radiation.

thermal radiation
  تابش ِ گرمایی   
tâbeš-e garmâyi (#)

Fr.: rayonnement thermique   

The energy radiated from an object in the form of → electromagnetic waves as a result of its → temperature. Thermal radiation ranges in → wavelength from the longest → infrared radiation through the → visible light spectrum to the shortest → ultraviolet rays. In opposition, → non-thermal radiation is caused by energetic particles.

thermal; → radiation.

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