So it's not a continuum of energy that we can have, it's only these punctuated points of energy that are possible.

我们得到的不是一个连续的能量，而是一些分立的可能的能量值。

麻省理工公开课 - 化学原理课程节选

We might be asked, for example, to determine what all of the different elements could be that would produce a spectrum that gave us 5 different lines.

那么我们会问，比如，有哪些不同的元素可以产生,一个有五条分立谱线的光谱？

麻省理工公开课 - 化学原理课程节选

Any one of these different elements could actually produce a photoelectron spectroscopy spectrum that has five distinct lines.

其中任何一种元素,都可能产生,有五条分立谱线的光电子能谱。

麻省理工公开课 - 化学原理课程节选

So, let's say we're looking at an element and we have an emission spectra, and we know that it has five distinct different kinetic energies in that spectrum.

比如我们正在研究一个元素,而且我们得到了它的光谱，知道了在它的光谱里,有五个分立的动能。

麻省理工公开课 - 化学原理课程节选

Any frequency can't have an energy, you have to -- you don't have a continuum of frequencies that are of a certain energy, it's actually punctuated into these packets that are called photons.

任何频率不能有个能量,你必须要-对某一个能量上,你不会有连续的频率,光子实际上分立的存在。

麻省理工公开课 - 化学原理课程节选

So, what he did was kind of impose a quantum mechanical model, not a full one, just the idea that those energy levels were quantized on to the classical picture of an atom that has a discreet orbit.

还不是完整的,只是这些能级，是量子化的概念，作用到原子有分立轨道的经典原子模型上,当他做了一些计算后,他得到有个半径,他算出来。

麻省理工公开课 - 化学原理课程节选

and he knew this the same way that we saw it in the last class, which is when we viewed the difference spectra coming out from the hydrogen, and we also did it for neon, but we saw in the hydrogen atom that it was very discreet energy levels that we could observe.

那就是,当我们看氢原子发出的光谱时，我们也看了氖气,但我们看到,氢原子能级是分立的，这些，在当时,已经被观察到了,他也都知道。

麻省理工公开课 - 化学原理课程节选

OK Is everyone seeing that? Yeah, pretty much. OK.

分立的各个谱线，有看到的吗？有很多。

麻省理工公开课 - 化学原理课程节选

So that's why we're not seeing separate lines in this spectrum.

因此，我们在光谱中看不到,分立的谱线。

麻省理工公开课 - 化学原理课程节选

So, how many distinct, so again, we're talking about distinct kinetic energies, a spectrum for the element hafnium, 72 and I'll tell you here that it has a z of 72, so you don't have to spend two minutes searching your periodic table.

好，有多少分立的……还是一样，我们讨论的还是不同的动能，铪元素的光谱中出现，而且我来告诉大家铪的原子序数是，这样你就不用因为在元素周期表中找它,而花费两分钟的时间了。

麻省理工公开课 - 化学原理课程节选

And when we talk about l it is a quantum number, so because it's a quantum number, we know that it can only have discreet values, it can't just be any value we want, it's very specific values.

当我们讲，l是一个量子数时，因为它是量子数，我们知道，它只能去分立的值，它不能取到所有的数，它取一些确定的数。

麻省理工公开课 - 化学原理课程节选