<P> The Zeeman effect ( / ˈzeɪmən / ; Dutch pronunciation : ( ˈzeːmɑn ) ) , named after the Dutch physicist Pieter Zeeman , is the effect of splitting a spectral line into several components in the presence of a static magnetic field . It is analogous to the Stark effect , the splitting of a spectral line into several components in the presence of an electric field . Also similar to the Stark effect , transitions between different components have , in general , different intensities , with some being entirely forbidden ( in the dipole approximation ) , as governed by the selection rules . </P>
<P> The Zeeman effect ( / ˈzeɪmən / ; Dutch pronunciation : ( ˈzeːmɑn ) ) , named after the Dutch physicist Pieter Zeeman , is the effect of splitting a spectral line into several components in the presence of a static magnetic field . It is analogous to the Stark effect , the splitting of a spectral line into several components in the presence of an electric field . Also similar to the Stark effect , transitions between different components have , in general , different intensities , with some being entirely forbidden ( in the dipole approximation ) , as governed by the selection rules . </P>
according to the zeeman effect the splitting of a sunspot 's spectral lines is due to
according to the zeeman effect the splitting of a sunspot 's spectral lines is due to
the presence of a static magnetic field
the presence of a static magnetic field