In physics, a light field describes the direction of all the idealised light rays passing through an area.

在物理学中，光场描述的是理想状态下光线辐射穿过一个地区。

youdao

It's like a mirage, where heat causes the bending of light rays and cloaks the road ahead behind an image of the sky.

实验就象海市蜃楼，在高温下，光线发生弯曲，从而前面的道路就看不见了，而只能看到后面的天空图像。

youdao

A geometric reconstruction of where the various light rays have been then creates an image of what could not ordinarily be seen.

一种几何重构可以了解这些光线反射前在哪里，这样就可以呈现出一张通常不能被看见的图像（指转角后面的图象，译者注）。

youdao

Sometimes we model light as beams of light, as rays of light.

有时候我们把光看成光束模型，看成光射线。

麻省理工公开课 - 固态化学导论课程节选

So you know that x-rays are higher frequency than UV light, for example, that means it's also higher energy than UV light, and if you think back to our photoelectric effect experiments, do you remember what type of light we were usually using for those? Does anyone remember?

你们知道，X，射线的频率比紫外光高，这意味着，它的能量也比紫外光要高，那么，请大家回想一下我们的光电效应实验，大家还记得当时我们用的是什么光源吗？,有人记得吗？

麻省理工公开课 - 化学原理课程节选

Because the metamaterial is imperfect, the light rays are distorted and interact with each other as they spread.

FORBES: University of Maryland Researchers Build a Big Bang In Their Lab

This helps "recycle" any light rays which fail to travel the desired path.

BBC: LED streetlamp aims to improve public's view of stars

The near object's gravity bends the light rays from the more distant object and magnifies them like a lens.

BBC: Artist's concept of a distant world (BBC)