The horses were climbing up a hilly piece of road when she first caught sight of a light.

当她第一次看到灯光时，马正爬上一段山路。

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Rapidly changing refraction due to turbulence along the line of sight affects different colors of light by different amounts and generally produces a twinkling effect for stars.

由于湍流而快速变化的折射在视线中会影响到光的不同颜色，这种影响也各不相同，一般会给恒星产生一种闪烁的效果。

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But, for answer, the old man only held his lanthorn up, so that in the ring of its pale light they saw some sight or other in the street.

不过，作为答复，老人只是把灯笼高高提了起来，好让他们在那黯淡的光圈中能见到些街上的景象。

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Medieval scholars were particularly fascinated by the science of optics and invented eye glasses partly as a result of their studies using lenses to determine the nature of light and the physics of sight.

FORBES: Connect

The sun had dropped behind the bluffs already, so that the tops of the bare trees showed up finely spiky, like hair or fur, against a yellow glow of light from somewhere out of sight.

NEWYORKER: Friendly Fire

Perot's eyes light up at the sight of yellow school buses in front of Houston's Museum of Natural Science.

WSJ: How Dallas Does Philanthropy: Perot Museum of Nature and Science