laser pointer

基本解釋

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.
為了有助于互動(dòng)，QB有一個(gè)激光指針，雙高清晰度的攝像頭，3.5英寸觸摸屏和揚(yáng)聲器。
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.
所以我們看到我們用激光筆,還是沒(méi)有逐出電子，即使我們有這樣的強(qiáng)度，它仍然與一個(gè)單個(gè)的光子能量無(wú)關(guān),所以我們不會(huì)看到光電效應(yīng)。

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?yàn)槲覀冇形业募t色激光筆，我們也可以用它試一下，它的波長(zhǎng)集中在700納米處。
麻省理工公開(kāi)課 - 化學(xué)原理課程節(jié)選
But luckily we had the control of the red laser pointer where nothing moved at all.
但是很幸運(yùn)我們可以,控制紅色激光筆,雖然什么都沒(méi)有移動(dòng)。
麻省理工公開(kāi)課 - 化學(xué)原理課程節(jié)選
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.
所以我們看到我們用激光筆,還是沒(méi)有逐出電子，即使我們有這樣的強(qiáng)度，它仍然與一個(gè)單個(gè)的光子能量無(wú)關(guān),所以我們不會(huì)看到光電效應(yīng)。
麻省理工公開(kāi)課 - 化學(xué)原理課程節(jié)選

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