And so when we get to n equals three that would be m shell by the spectroscopists' notation.

当n等于3的时候,根据光谱学家的标记法，那就是第m层。

麻省理工公开课 - 固态化学导论课程节选

Spectroscopy is how you go and look at patterns, not just individual lines.

光谱学就是你怎样运行和看待一个图案的，而不是单独的线条。

麻省理工公开课 - 固态化学导论课程节选

So these names, they don't really make any sense why they're called past s p and f, and it turns out that it comes from spectroscopy terms that are pre-quantum mechanics where, for example, this is called the sharp line, I think the principle, the diffuse, and the fundamental.

看到这些名字，你会发现,它们为什么叫s，p，f是没什么道理的，事实上,它们来源于,量子力学之前的光谱学中的术语，例如，它们分别叫做锐线，我认为是主线，漫射和基本。

麻省理工公开课 - 化学原理课程节选

S This is s. S, according to spectroscopy, 0 means that l equals zero.

这就是s的意义，在光谱学中，表示l等于。

麻省理工公开课 - 固态化学导论课程节选