尼尔斯·玻尔(Niels Bohr)于1913年提出了原子构造的玻尔模型，其中电子环绕着原子核运转。模型中提及电子只会在特定的几个距离（视能量而定）环绕原子核运转。而最简单的原子──氢原子──只有一个电子轨道，该轨道也是电子可运行的最小轨道，其能量是最小的，从原子核向外找到此轨道的最可能距离就被称为玻尔半径(Bohr radius)。
玻尔半径
双语例句原声例句
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So, I said I'd tell you a little bit more about where this Bohr radius came from, and it came from a model of the atom that pre-dated quantum mechanics, and Neils Bohr is who came up with the idea of the Bohr radius, and here is hanging out with Einstein, he had pretty good company that he kept.
我要告诉你们,波尔半径是从哪里来的,它起源于前量子力学时代的，原子模型,尼尔斯，玻尔提出了，波尔半径的概念,这是他和爱因斯坦在一起，他们是好朋友，当我们讨论这个原子模型时你们要记住的是，在1911年。
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This is what's called the Bohr radius, and we'll explain - hopefully we'll get to it today where this Bohr radius name comes from, but for now what you need to know is just that it's a constant, just treat it like a constant, and it turns out to be equal to or about 1/2 an angstrom.
它叫做玻尔半径，我们后面会解释,希望我们今天可以讲到,波尔半径这个名称的由来，但现在你们只要记住,它是一个常数，只要把它当做一个常数对待，它等于,或者是1/2埃。
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For the 2 s orbital, at 2 a nought, a0 so it's just 2 times that constant a nought, which is the Bohr radius.
也就是，乘以常数,玻尔半径，对于3s轨道。
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