laser pointer

基本解释

I need my laser pointer.
需要我的激光棒。
To help interact, QB has a laser pointer, twin high-resolution cameras, a 3.5-in. touch screen, and speakers.
为了有助于互动，QB有一个激光指针，双高清晰度的摄像头，3.5英寸触摸屏和扬声器。
So we see that we do not eject electrons in the case of the laser pointer, even if we have this intensity, it is still not related to the energy of an individual photon, so we won't see an effect.
所以我们看到我们用激光笔,还是没有逐出电子，即使我们有这样的强度，它仍然与一个单个的光子能量无关,所以我们不会看到光电效应。

And then since we have my red laser pointer, we will also try with the red laser pointer, which is centered at wavelength of 700 nanometers.
然后因为我们有我的红色激光笔，我们也可以用它试一下，它的波长集中在700纳米处。
麻省理工公开课 - 化学原理课程节选
But luckily we had the control of the red laser pointer where nothing moved at all.
但是很幸运我们可以,控制红色激光笔,虽然什么都没有移动。
麻省理工公开课 - 化学原理课程节选
So we see that we do not eject electrons in the case of the laser pointer, even if we have this intensity, it is still not related to the energy of an individual photon, so we won't see an effect.
所以我们看到我们用激光笔,还是没有逐出电子，即使我们有这样的强度，它仍然与一个单个的光子能量无关,所以我们不会看到光电效应。
麻省理工公开课 - 化学原理课程节选

Includes a unique presentation mode on the iPad, letting you turn your mouse cursor into a laser pointer.
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