An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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frequency spectrum
  بیناب ِ بسامد  
binâb-e basâmad
Fr.: spectre de fréquence  

A graphical display of the intensity of radiation or energy versus frequency.

See also: → frequency; → spectrum.