beam of light

基本解釋

A beam of light that can pull is counterintuitive to physicists, who have spent centuries studying light’s ability to push.
由于已經(jīng)花了幾個(gè)世紀(jì)研究光的推動(dòng)能力，物理學(xué)家們的直覺(jué)意識(shí)到會(huì)有一種光束能夠拉動(dòng)物體。
And Grier should know: he designed his own tractor beam and built it, demonstrating for the first time that a beam of light can tug objects over long distances.
因?yàn)樗O(shè)計(jì)并制造了他自己的牽引光束裝置，并且用他的裝置第一次證明了光束可以遠(yuǎn)距離拖動(dòng)物體。
These can be customised after surgery by playing a low-intensity beam of light onto their photosensitive material.
這些晶體可以在手術(shù)之后通過(guò)將一束低強(qiáng)度的光照到其光敏物質(zhì)上來(lái)定制（功能）。

This intense heat they project in a parallel beam against any object they choose, by means of a polished parabolic mirror of unknown composition, much as the mirror of a lighthouse projects a beam of light.
So this gives you a little bit of an idea of just how many individual photons there are in a laser beam of light. This is a huge number of photons.
這個(gè)給你們一點(diǎn)思路關(guān)于,一個(gè)激光束有多少獨(dú)立的光子,這是一個(gè)巨大的光子數(shù)目。
麻省理工公開(kāi)課 - 化學(xué)原理課程節(jié)選
So what we end up with for the number of photons in this laser beam of light is 2.1 times 10 to the 17 photons.
這個(gè)激光束的數(shù)目是,2，1乘以10的17次方。
麻省理工公開(kāi)課 - 化學(xué)原理課程節(jié)選

Is the best beam of light one by a window, or encircling a bed?
FORBES: Using A Light Barrier To Repel Mosquitoes