An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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elementary time
  زمان ِ بنیادین  
zamân-e bonyâdin
Fr.: temps élémentaire  

The time required for → light to cross the classical radius of the electron
(→ electron radius): te = re/c ≅ 10-23 s.

See also: → elementary particle; → time.