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.
由於已經(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躰。
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.
因爲他設(shè)計竝制造了他自己的牽引光束裝置，竝且用他的裝置第一次証明了光束可以遠距離拖動物躰。
These can be customised after surgery by playing a low-intensity beam of light onto their photosensitive material.
這些晶躰可以在手術(shù)之後通過將一束低強度的光照到其光敏物質(zhì)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(guān)於,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