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Why splitting of spectral lines is obser...

Why splitting of spectral lines is observed when the source producing the atomic spectrum is placed in a magnetic field?

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In the presence of magnetic field, the orbital present in a sub-shell (which were originally degenerate) take up different orientations and hence their degeneray is lost.
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CHHAYA PUBLICATION-STRUCTURE OF ATOM-QUESTION ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE)
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