And then since we have my red laser pointer, we will also try with the red laser pointer, which is centered at wavelength of 700 nanometers.

然后因为我们有我的红色激光笔，我们也可以用它试一下，它的波长集中在700纳米处。

麻省理工公开课 - 化学原理课程节选

We have a UV lamp right here, which is centered at a wavelength of 254 nanometers.

我们有一个紫外灯在这里，波长集中在254纳米处。

麻省理工公开课 - 化学原理课程节选

So it's centered at this frequency that was expected, but it's actually split into two different frequencies.

它的中心在预计频率处，但劈裂成两个不同频率。

麻省理工公开课 - 化学原理课程节选