An Etymological Dictionary of Astronomy and Astrophysics

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Stark effect
  اُسکر ِ اشتارک  
oskar-e Stark
Fr.: effet Stark  

The → splitting of spectral lines of atoms and molecules
due to the presence of an external electric field, which slightly changes the → energy levels of the atom. → Zeeman effect.

See also: Named after Johannes Stark (1874-1957), a German physicist, and Physics Nobel Prize laureate (1919); → effect.