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)花了幾個世紀研究光的推動能力，物理學家們的直覺意識到會有一種光束能夠拉動物體。
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.
因為他設計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距離拖動物體。
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之后通過將一束低強度的光照到其光敏物質上來定制（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.
這個給你們一點思路關于,一個激光束有多少獨立的光子,這是一個巨大的光子數(shù)目。
麻省理工公開課 - 化學原理課程節(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.
這個激光束的數(shù)目是,2，1乘以10的17次方。
麻省理工公開課 - 化學原理課程節(jié)選

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