ThinK bacK to the random walK of a light ray through a cloud.

回想到光线在云中的随机穿梭。

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The refraction directions both the wave normal and the light ray can be calculated by the formulas above.

文章所得解析公式完全可以确定折射光的波法线和光线的方向。

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By calculating the path between the lens and the sensor, the precise direction of a light ray can be reconstructed.

通过计算镜头和传感器之间的路径，可以重建一个具有精确方向的光线。

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Finally,a single ray of light shot from out and fell full upon the vulture eye.

VOA: special.2009.05.16

And what's interesting about this sun is it has a ray of light coming out of the top.

这幅画的有趣之处在于红日的光线从画面的顶端射了出来。

It's like 课堂 - SpeakingMax英语口语达人

And then,when my head was well in the room, I undid the lantern just so much that a single thin ray of light fell upon the vulture eye.

VOA: special.2009.05.16

The hybrid disc works by making the Blu-ray layer act like a two way mirror, reflecting enough light for Blu-ray playback, but letting enough light through for HD DVD operation.

ENGADGET: Three's company: Warner patents all-in-one hybrid disc HD

Gamma-rays are the most energetic form of light, with wavelengths far shorter than ordinary optical light (the light your eye can see), or even ultraviolet or X-ray light.

CNN: Why gamma-ray burst shocked scientists

"Wise is finding them across the full sky, while Nustar is giving us an entirely new look at their high-energy X-ray light and learning what makes them tick, " he said.

BBC: Supermassive black holes and hot galaxies in giant haul