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It turns out there's a new function strlen S-T-R-L-E-N that you probably have not used yet called strlen, S-T-R-L-E-N, programmers early on and still like to be succinct but communicates sufficiently what they mean.
结果这里有个新的函数,你可能没有使用过，叫做，早期的和现在的程序员喜欢简洁地,但是能充分的传达他们的意思。
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And if you've typed in l when you should've 1 typed a 1, or a 1 when you should've typed an l, you're likely to miss it. If you've made a mistake with upper and lower case. Things like that. So just be very careful looking at that.
如果你本来想打，1，的时候,却输成了，l，或者打，l，的时候输成了，你很可能注意不到这个错误,如果你把大小写弄混了也是一样,要注意这个错误。
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And this spin magnetic quantum number we abbreviate as m sub s, so that's to differentiate from m sub l.
这个自旋磁量子数我们把它简写成ｍ下标ｓ,以和ｍ小标ｌ有所区分。
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n*pi/L It turns out it is n pi over l.
结果是。
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long l So let me try this, long l, and then let me do a little Copy Paste here and say a long is actually the size of l. So let me quit that program; recompile.
让我们来试一下，然后我在这里复制粘贴一下,这里long的大小实际上是l的大小，所以让我退出,那个程序，重新编译。
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When I was working in a place called Tulle, which is down here--t-u-l-l-e, not Tours, but Tulle-- I knew vaguely that there had been a massacre there in June sixth, 1944, and a lot of people had been hung.
我在一个叫蒂勒的地方工作的时候,在这里t-u-l-l-e,不是图尔是蒂勒,我大概记得,在1944年六月六号那里有个大屠杀,很多人被吊死了
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In contrast, if we're taking the wave function and describing it in terms of n, l, m sub l, and now also, the spin, what are we describing here?
相反，如果我们考虑一个波函数,然后用ｎ，ｌ，ｍ小标ｌ,还有自旋，我们描述的是什么？
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Didn't create a new list. The old l is still there but it's different than it used to be.
它改变了数组，而并没有新建一个数组,老数组l依旧存在。
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And is no longer that sole determining factor for energy, energy also depends both l on n and on l.
对于能量的,唯一决定性因素,它也依赖于n和。
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And the complete description, as I said, n l m is from n l and m.
我说过完整的描述，需要。
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PROFESSOR: OK. We can have n 4, l 3, and then, sure, we can have m sub l equal negative 2 if l equals 3 What's the second value of l that we can have?
教授：嗯，我们有ｎ４，ｌ３,然后我们有ｍｌ等于－２，如果ｌ等于３,ｌ可以有的第二个值是多少？
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l l So what you can do for a 1 s is just take 1 minus 1 and then l is equal to 0, so you have zero radial nodes.
它等于1减去,是等于0的，所以没有节点，这和我们看到的是相符的。
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So let's think about lists. So if l is a list, l sort I can call something like s dot sort, l dot sort.
所以让我们想想链表，所以如果l是一个，链表我可以调用像是s，sort的函数。
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Yup. So m sub l could equal 2 negative 2, negative 1, 0, 1 or 2.
嗯，m下标l可以等于,2，-1，0，1，或。
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For an angular node, we're just talking about what the l value is, so whatever l is equal to is equal to the number of angular nodes you have.
对于角向节点，我们其实就是在讨论l，的值是多少，因此不管，l，的值等于几,它就等于你所有的角向节点的数目。
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And then if we think about 3 s, 0 we want to start with 3, we subtract 1, again l is equal to 0, so minus and we have two radial nodes.
我们从3开始，减去，同样的l等于，所以减去0，我们有两个节点，这应该。
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