In this case, it's called the ionization energy, plus whatever kinetic energy we have left over in the electron.
在这种情况下,它就是电离能,剩余部分将转化为,出射电子的动能。
And what's interesting about this sun is it has a ray of light coming out of the top.
这幅画的有趣之处在于红日的光线从画面的顶端射了出来。
And to accept that - to quote him - "it shoots, it hits".
引用作者的话,便是,箭在射,箭打中了靶心。
The second piece of information we need to know is what actually the kinetic energy is of the ejected electron, and that's something we can just measure by measuring its velocity.
其次,我们需要知道的信息是,出射电子的动能,这可以通过,测量它们的速度得到。
And their aim is to kick it into the goal.
罚球者的目标是射进这个球
And you might think they would say, "I'm afraid of being shot.
你也许以为他们会说,我害怕被射死。
So I really like the zombie games and shooting adversaries and surviving.
我最喜欢玩僵尸游戏,我喜欢射死对手,然后活下来。
But he believed that it was important to take the tools of science, to take the tools of rational thought and apply them to the good of the state, even if you saw that good of the state as in ships that could lob cannonballs even further against hostile ships, and that kind of thing.
但他同时还认为,借助利用科学和理性的工具,来为国家利益服务也是非常重要的,即使你所看到的所谓"国家利益",只是军舰上的炮弹能比敌舰射得更远,或者其他诸如此类的东西
And what we have left over is this amount of energy here, which is going to be the kinetic energy of the ejected electron.
都用来发射它,剩下的这些就是,出射电子的动能。
How about if we shoot this many photons?
如果我们把这众多的光子,射出去又会怎样?
The second particle was deflected almost not at all. But what he could tell from the fact that there was a second particle at all, and the fact that it was in this direction, is that in addition to his negative particle, he also, of course, had a positive particle that was within this stream of rays that were coming out.
粒子的强烈信号,有着强烈的对比,第二个粒子几乎,不发生偏转,他能判断这是,第二个粒子的原因是它在这个方向,所以在出射射线中,除了有带负电的粒子外。
The highest occupied orbital is now the 2 s orbital, 1 s 2 2 s 1 so we're going to end up with boron 2 plus 1 s 2, 2 s 1, plus the electron coming out of there.
现在最高的被占据轨道是,2,s,轨道,因此结果应该是正二价的硼,再加上一个出射的电子。
So this weekend a penalty was missed exactly by somebody ignoring this rule.
这周末的点球未射进,绝对是因为罚球球员不懂这个规律
So, for example, here we're showing rubidium and potassium and sodium plotted where we're plotting the frequency -- that's the frequency of that light that's coming into the metal versus the kinetic energy of the electron that's ejected from the surface of the metal.
让大家看来都是可以理解的事情,就是把不同金属的观测结果,画到一张图里面来,例如这里,我们展示的是钠,钾,铷的频率-这是照射金属的光的频率,和金属表面出射电子动能的关系。
So, we could also plot the number of electrons that are ejected as a relationship to the intensity, so that was yet another experiment they could do.
我们还可以画出出射,电子数和光强的关系,这是他们做的。
If you can kick the ball very hard, but not very accurately, then if you try and shoot to the left or right, you're slightly more likely to miss.
如果你只会大力抽射但是缺乏精准,当你射向左路或者右路时,你有可能会射偏
Imagine that rod shooting upwards.
想象一下铁棒从头顶射过。
And what we would see if we were graphing, for example, increasing kinetic energy, is we would see 1 line corresponding to each of these energies of electrons that we see coming out.
如果我们将它画出来会看到,比如以动能增加的顺序,这里一条线就对应着,一个出射电子可能带有的动能中的一种。
If I went on and told you what the different incident light was, and what the electrons were ejected with, and then you could look up the ionization energy for the particular different elements, you should be able to actually determine exactly which element it is, but just with the information given, we can only narrow it down to these choices here.
如果我继续告诉大家入射光源是什么,出射电子的动能是多少,那么你可以去查一查,以上各个元素的电离能,这样你就应该能确定,这个元素到底是哪个,但是只凭题目中的信息,我们只能把范围缩小至以上几种元素。
So, one thing they did, because it was so easy to measure kinetic energy of electrons, is plot the frequency of the light against the kinetic energy of the electron that's coming off here. And in your notes and on these slides here, just for your reference, I'm just pointing out what's going to be predicted from classical physics.
他们做的其中一件事,因为测量电子动能是很容易的,就是画出光的频率,和出射电子动能之间的关系,在讲义的这里,仅仅是,为了做个比较,我要指出,经典物理所给出的预测,这个不作为对你们的要求。
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