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Dictionary

Pa'schen-Back' effect"

Pronunciation: (pä'shun-bäk'), [key] 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. Cf. Zeeman effect.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

paschal letter

Paschen series

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