Again, in an electric field line splitting observed, the intensity of the line splitting varying with the intensity of the applied electric field.

结果也证明谱线在电场中也会分裂，而且其分裂程度,随电场强度变化而变化。

麻省理工公开课 - 固态化学导论课程节选

And he found line splitting in the magnetic field.

他发现光谱线在磁场中分裂了。

麻省理工公开课 - 固态化学导论课程节选