An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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diffraction grating
  توری ِ پراش  
turi-ye parâš (#)
Fr.: réseau de diffraction  

An optical device containing thousands of very fine parallel grooves which produce interference patterns in a way which separates out all the components of the light into a spectrum.

See also: → diffraction; → grating.