We have here the spin angular momentum that you saw.
这有一个旋转的角动量,如你们所见。
I am the spin angular momentum.
我就是旋转的角动量。
You give it spin angular momentum, it becomes stable.
有了一个旋转的角动量，就变得稳定。
有了旋转的角动量。
So spin angular momentum has the property of stabilizing things.
旋转的角动量有，稳定事物的性质。
Look at that spin angular momentum.
观察那个旋转角动量。
So the torque is persuading the spin angular momentum to change.
所以力是使得旋转的角动量,改变的理由。
What will the spin angular momentum do?
旋转的角动量会怎样呢？
Spin angular momentum will start to chase the torque.
旋转的角动量会开始，跟随那个力。
That's a spin angular momentum.
那是旋转的角动量。
And as long as I torque it like this, that spin angular momentum wants to go around in the horizontal plane.
只要我这样使力，旋转的角动量就是想要，水平的转动。
If I put it on this side, torque is now in this direction, spin angular momentum is in this direction.
在这边，力现在就是这个，方向的，旋转角动量是，这个方向的。
So this was originally the spin angular momentum of the wheel.
所以，这是原本的旋转的，角动量。
And so the angular momentum of spin of the wheel is in this direction.
所以旋转的角动量是，这个方向。
The spin angular momentum is now in this direction, so I'm going to give it a torque like so.
旋转的角动量现在是这个,方向的，我给它一个这样的力。
And what does the spin angular momentum do?
旋转的角动量怎么了呢？
So the torque will also change direction and so this angular momentum, spin angular momentum will keep chasing the torque and start to rotate freely.
所以力也会改变方向,这个角动量，角动量会保持追着力,并开始自由地转动。
But notice that l, the spin angular momentum, has moved from here to here.
注意l，旋转的角动量，已经从这移到了这。
I've changed the direction of the spin angular momentum.
我改变了旋转角动量，的方向。
So this only holds in situations where the spin angular momentum is way, way larger than the angular momentum that you get due to the precession.
所以成立的情况是，旋转的角动量，比旋进的角动量要，大很多很多才行。
I'll give it a little bit more spin angular momentum, so now I move my left hand towards me and my...
我再给它多一点的角动量，现在我将我的左手朝我移动。
I'm going to spin it with a high angular momentum, high spin angular momentum.
以高的角动量来旋转，高旋转的角动量。
Angular momentum has two key components: spin angular momentum and orbital angular momentum.
角动量有两个分量：自旋角动量和轨道角动量。
Absorption of the light allows both the spin and orbital angular momentum of a light beam to be transferred to microscopic particles held within optical tweezers, forming an optical spanner.
光的吸收可以同时导致光束的自旋角动量或轨道角动量转移给微米粒子，就像光学镊子一样引起粒子的转动，从而形成光学扳手。
This article reviews the physics of angular momentum transfer and loss in optical pumping and spin-exchanging collisions.
评述了光抽运和自旋交换碰撞中角动量转移和损失的物理。
Unlike Einstein's equations, ECKS gravity takes account of the spin or angular momentum of elementary particles.
不同于爱因斯坦的方程，ECKS万有引力理论考虑了基本粒子的旋转或角动量。
Besides, the conservation property of the intrinsic angular momentum, the relations between the spin angular momentum an…
导出了电磁场的自旋角动量与内禀角动量的关系。
Besides, the conservation property of the intrinsic angular momentum, the relations between the spin angular momentum and the intrinsic angular momentum of an electroma…
导出了电磁场的自旋角动量与内禀角动量的关系。
Besides, the conservation property of the intrinsic angular momentum, the relations between the spin angular momentum and the intrinsic angular momentum of an electroma…
导出了电磁场的自旋角动量与内禀角动量的关系。
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