你们知道作业是关于光谱学的，对吧？

You know the assignment has to do with Spectroscopy, right?

youdao

四十年前，光谱学的测量结果最多能保持六到七位有效数字。

Forty years ago, spectroscopy measurement results were given with six or seven digits at most.

youdao

这种元素是利用 X 射线光谱学发现的。

The element was found using X-ray spectroscopy.

youdao

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