paschen back effect

Paschen-Back effect

noun Physics.
a splitting of spectral lines observed when the source of a radiation is subjected to a strong magnetic field, caused when the vectors associated with the spin and orbital angular momentum exhibit individual rather than common precession.
Compare Zeeman effect.

1920–25; named after Friedrich Paschen (1865–1947) and Ernst Back (1881–1959), German physicists Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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