An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک



soft X-rays
  پرتوهای ِ ایکس ِ نرم  
partowhâ-ye iks-e narm
Fr.: rayons X mous  

X-ray photons with energies between about 0.1 to 10 keV. → hard X-rays.

See also:soft; → X-rays.