In other words, energy comes out when light goes in.
也就是说，光照进去，能量出来。
Your body is hardwired to wake up when light is bright and go to sleep when it gets dark.
身体的清醒度与光线息息相关，当天亮了我们会醒来，反之我们就会想睡觉。
Double arcs happen when light is reflected more than once in an atmospheric water droplet.
双重彩虹的产生是由于光线不止一次地被大气中的水滴所反射。
Normal rainbows form when light refracts through raindrops, mist, or sometimes even sea spray.
正常的彩虹是由于光通过雨水，雾气，有时甚至海浪的折射所形成。
The sun and stars are daily proof of the great energy released when light atomic nuclei join together.
太阳和星星就是日常生活中轻原子核结合时释放的巨大能量的证明。
The pupil, the black part of the eye, usually gets smaller when light is held in front of it.
瞳孔即眼球中间黑色部分，瞳孔反射即当光线照射瞳孔时，瞳孔会变小。
The sun and stars are daily proof of the great energy released when light atomic nuclei join together .
太阳和星星就是日常生活中轻原子核结合时释放的巨大能量的证明。
Redshift refers to what happens when light seen coming from an object is proportionally shifted to appear more red.
红移是指当一个天体发出的光线看起来成比例地更偏向红色。
Because color is what we perceive when light of a particular frequency meets cones-special cells in your retina.
因为，当特定波长的光线作用于视锥细胞(视网膜中的一种特殊的细胞)时我们所接收到的便是颜色。
A redshift can be measured when light from a galaxy is broken up and spread out into a band of colors called a spectrum.
当从星系发出的光被分解展开成光谱的时候就可以测出红移了。
The fiber is internally reflective at specific points, so that when light is sent along the fiber, some of it bounces back to a detector.
在特定点上，纤维可以向内反射光线，当光线沿纤维传输时，部分会反射到探测器上。
Like a rainbow, its daylight equivalent, a moonbow is produced when light is broken up into its constituent colours as it passes through water droplets.
月虹与白天出现的彩虹一样，是光通过水滴分解成多种色光后产生的，而光本身是由多种色光组成的。
Color is the sensation that is invoked when light of wavelengths between 360nm and 720nm hits our eyes and then is processed by our visual system [3].
颜色是360nm至720nm之间的光波刺激人类的眼睛并由视觉系统[3]进行处理后所触发的感知。
There are no obvious difference in latent period (P>0.05), but distinct difference in amplitude of wave P100 when light amblyopia is compared with normal (P<0.05).
而正常组与轻度弱视间P100波潜伏期无明显差异（P >0.05），但振幅则有明显差异（P< 0.05）。
By measuring the photon signatures left when light bounces off photosynthesizing cells, astronomers may soon have a new tool for detecting extraterrestrial organisms.
通过测量光线从光合作用细胞反射后遗留下来的光子标记，天文学家们可能很快就能拥有一种新的探测外星生命的工具了。
The results show that logarithmic light intensity fluctuation variance will be less when light source coherence becomes worse, i. e. it becomes into partially coherent light.
其结果表明，当光源的相干性变差，即变为部分相干光后，对数光强起伏方差变小；
The expanding ring carries with it another great mystery, however: why wasn't this supernova seen 400 years ago when light from the initial blast should have passed the Earth?
关于这个正在膨胀的圆环，还有一个不为人知的秘密——400年前，当这颗超新星开始爆发，为什么地球上没人注意到？
The reaction of amino acids and silver is a thermal spontaneous process without additional energy. But when light introduced into the system the reaction speed will be changed.
氨基酸与银的反应是一个不借外加能量热力学上即可进行的过程，但当引入光之后，可改变反应速率。
The gravitational lens equations account for all the variables such as distance and density, and provide a better idea of when light left the background galaxy and how far it traveled.
引力透镜公式计算所有的变量，比如距离和密度，对光何时离开背景星系以及行走了多远的距离给出更好答案。
This extension of the photoelectric effect, in which one photon knocks one electron off the edge of an atom, could make physicists reconsider when light is a wave and when it's a particle.
在这种光电效应的延伸中，一个光子从原子的边缘打出一个电子，这可能要使物理学家们重新考虑光在什么情况下是波，什么情况下是粒子。
When light hits a piece of silicon, it knocks out electrons.
当光照射到一片硅时，硅表面逸出电子。
When light passes through substances, including air, its speed is slowed down.
光穿过包括空气在内的物体时，它的速度减慢。
When light enters water, its intensity quickly decreases and its color changes.
当光线进入水中，它的强度迅速降低，其颜色亦发生变化。
When light is absorbed it alters the arrangement of electrons in the absorbing molecule.
当吸收光能后，就会改变吸收分子中电子的排列。
When light hits you from above, it creates shadows on your face, particularly under the eyes.
当光线从上方往下照时，会在脸上投下阴影，特别是在眼睛下方。
When light hits an object, it bounces off the surface and into the naked eye, making it visible.
当光线照射物体，物体表面反射光线到肉眼，使物体能被看见。
When light from a single direction (e.g. our sun) hits an object, part of the object is in shadow.
当单一光源例如太阳照到某个物体上，物体的一部分会处于阴影中。
'Tis heard in spring When light and sunbeams, warm and kind, On angel's wing Bring love and music to the mind.
春日闻知音阳光暖人心，天使振翅飞带来爱之音。
When light of a particular wavelength is shone upon them they start to glow, emitting light of characteristic hue.
当一定波长的光线照射到它们时，它们就会开始闪烁，发出特定颜色的光。 。
When light of a particular wavelength is shone upon them they start to glow, emitting light of characteristic hue.
当一定波长的光线照射到它们时，它们就会开始闪烁，发出特定颜色的光。
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