In December
1897, Preston (T.supeston) reported that, in many experiments is not
always observed spectral lines split into three intervals are not the
same, it is this phenomenon called the anomalous Zeeman effect will be
found in the phenomenon called the Zeeman original normal Zeeman
effect. Anomalous Zeeman effect of the mechanism in the subsequent
period of 20 years have not been able to be a good explanation,
troubled by a large number of physicists. In 1925, two Dutch students
Uhlenbeck (GEUhlenbeck ,1900 - 1974) and ancient pursuing with
(SAGoudsmit ,1902 - 1978) put forward the electron spin hypothesis well
explains the anomalous Zeeman effect.
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