• And we can simplify this expression as saying negative e squared over 4 pi, epsilon nought r squared. Epsilon nought is a constant, it's something you might see in physics as well.

    也会遇到它,在这里,你可以就把它,理解为一个转换系数,我们需要做的。

    麻省理工公开课 - 化学原理课程节选

  • I'm glad to hear that no one counted this r equal zero as a node.

    我很高兴没听到有人把r等于0这处也算作是一个节点。

    麻省理工公开课 - 化学原理课程节选

  • We notice that the value of E at r naught is negative, as it should be. It's a negative number.

    我们主要到在r圈时E的值为负,和它本来的值一致,是一个负数。

    麻省理工公开课 - 固态化学导论课程节选

  • take the derivative of this, get the velocity vector and you notice his magnitude is a constant Whichever way you do it, you can then rewrite this as v square over r.

    对这个式子求一次导,就能得到速度矢量,你会发现其模长是常数,不管用什么方法,加速度也可以写成 v^2 / r

    耶鲁公开课 - 基础物理课程节选

  • R And we abbreviate that by calling it r, l by two quantum numbers, and an l as a function of little r, radius.

    我们把它简称为,两个指定的量子数n和,它是半径小r的函数。

    麻省理工公开课 - 化学原理课程节选

  • We can use the Coulomb force law to explain this where we can describe the force as a function of r.

    我们用库伦定律解释它,力作为距离r的函数,让我们考虑一下。

    麻省理工公开课 - 化学原理课程节选

  • So, for example, if I have a sodium ion over here, and I have a chloride ion over here, where the distance from center to center r I'm denoting as r, this is nucleus to nucleus separation.

    所以,比如这有一个钠离子,和一个氯离子,它们中心与中心间的距离,我把它设为,这是原子核和原子和的间距。

    麻省理工公开课 - 固态化学导论课程节选

  • That was Cartesian space. When I plot r as a distance out from the nucleus that is sort of our simple-minded planetary model. Now let's look at energy.

    笛卡尔坐标系,当我用r表示,离原子核的距离时,那只是我们头脑中简单的,类似行星的模型,现在我们看一下能量问题。

    麻省理工公开课 - 固态化学导论课程节选

  • l But now we need to talk about l and m as well. So now when we talk about a ground state in terms of wave function, we need to talk about the wave function of 1, 0, 0, and again, as a function of r, theta and phi.

    但我们现在需要讨论,和m,现在当我们讨论,波函数的基态时,我们讨论的,是1,0,0的波函数,同样的,它也是r,theta和phi的函数。

    麻省理工公开课 - 化学原理课程节选

  • If you want to write it as a vector equation, you want to write it as v square over r minus-- I want to say that it's pointing in the direction toward the center.

    如果要写出矢量方程,就应该写成 -v^2 / r,也就是说,方向就向圆心

    耶鲁公开课 - 基础物理课程节选

  • a perfectly spherical shell dr at some distance, thickness, d r, dr we talk about it as 4 pi r squared d r, so we just multiply that by the probability density.

    在某个地方的完美球型壳层,厚度,我们把它叫做4πr平方,我们仅仅是把它,乘以概率密度。

    麻省理工公开课 - 化学原理课程节选

  • So if, in fact, we want to describe a wave function, we know that we need to describe it in terms of all three quantum numbers, and also as a function of our three positional factors, which are r, the radius, phi plus the two angles, theta and phi.

    实际上,我们想描述波函数,我们知道我们需要,用这三个量子数来描述它,同样,波函数还是,三个位置变量的函数,它们是r半径,还有两个角度theta和。

    麻省理工公开课 - 化学原理课程节选

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