An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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center wavelength
  موج-طول ِ مرکز  
mowjtul-e markaz
Fr.: longueur d'onde centrale  

Center of a filter passband measured at 50% of peak transmittance.

See also: → center; → wavelength.