An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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vacuum polarization
  قطبش ِ خلاء  
qotbeš-e xala'
Fr.: polarisation du vide  

A quantum field theory a process in which an electromagnetic field gives rise to virtual electron-positron pairs that in turn exert electromagnetic fields of their own, in a manner similar to classical dielectric polarization.

See also: → vacuum; → polarization.