An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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beam
  تابه  
tâbé (#)
Fr.: 1) faisceau, 2) lobe, 3) tache de diffraction  

  1. A collection of nearly parallel → light  → rays or a concentrated stream of → particles. See also → beam of light.

  2. The area of the sky being observed at any one time by a → radio telescope.

  3. The size of the → diffraction pattern; synonymous with point spread function.

Etymology (EN): M.E. beem, from O.E. beam “tree;” akin to O.H.G boum “tree,” Ger. Baum.

Etymology (PE): Tâbé, from tâb; tâbidan “light; to shine”

  • -é noun suffix.