An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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monochromatic opacity
  کدری ِ تکفام  
kederi-ye takfâm
Fr.: opacité monochromatique  

The sum of → absorption coefficient (κν) and → scattering coefficient (σν) at a given frequency: kν = κν + σν. See also the → Rosseland mean opacity.

See also: → monochromatic; → opacity.