In other words, energy comes out when light goes in.
也就是说，光照进去，能量出来。
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 bounces off them, it recreates the appearance of a 3d image.
当光线在它上面发生折射时，就出现了三维图像。
When light bounces off of an object, it does so at an infinite number of angles.
光线从某一物体上折射时，会沿着无数不同的角度散开。
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。
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 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。
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。
When light passes near a massive object, its path gets bent, like a car driving on a curved, banked road.
当光线接近一个巨大物体时，光的路径会变弯，就像汽车在弯曲的车库道上行驶一样。
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。
When light hits a finger, the ridges of the fingerprint reflect one polarization of light, while the valleys reflect another.
当偏振光投射到手指上时，指纹的脊线将反射了光的一个偏振态，同时脊谷反射另一个偏振态。
When light falls on to a leaf, the energy is absorbed and used to carry out specific chemical reactions, helped along by enzymes.
当阳光照射在一片叶子上的时候，能量被吸收，然后在酶的催化作用下，利用吸收的能量进行一些特殊的化学反应。
Therefore, when light energy strikes the material, all of the excitons flow to the center of the fiber, where they are concentrated.
这样，当有光照射到材料上并激发激子后，所有激子将流向在纤维管的中心并在此集中。
Its researchers used photodiodes (the technology found in digital cameras) that generate an electrical signal when light strikes them.
该公司的研究人员应用的原理是，当可见光照到光电二极管时可以产生电信号(在数码相机中研发了该项技术)。
When light waves were projected onto the disc, the direction of the electric field within the waves aligned with the gold nanorods.
当光波被投射到光盘上时，光波内电场的方向会与金纳米棒相一致。
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。
The structure of these particles changes in a magnetic field in a way that produces “interference” colours when light is shone on them.
一定程度上，在磁场中这些粒子的结构发生改变，有光照射时它们会产生“串扰”颜色。
Its researchers used photodiodes (the technology found in digital cameras) that generate an electrical signal when light strikes the m.
该公司的研究人员应用的原理是，当可见光照到光电二极管时可以产生电信号(在数码相机中研发了该项技术)。
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。
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。
When light from a star passes near a galaxy, for example, its path bends, changing where the star appears in the sky-the so-called gravitational lensing effect.
例如，当恒星发出的光经过一个星系附近，其路径会弯曲，改变恒星出现在天空中的位置——这就是所谓的引力透镜效应。
When light waves enter normal materials such as glass, the material alters the electric and magnetic fields in the light, slowing the waves to a particular new speed.
当光波进入普通材料时，如玻璃，这些材料改变了光波中的电磁场，使光波降低到某一新的速度。
When light from an object such as a machine part strikes the camera, the sensitive materials measure the intensity of light and convert the light rays into a range of numbers.
当一个物体上的光，如机器零件，照射到相机上时，敏感材料就可测量出光的强度，把光线转换为一组数字。
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。
When light falls on the nanotubes, they release energetic charge carriers, which split the water molecules inside them into two reactive components - hydroxide radicals and hydrogen ions.
当阳光照射在纳米管上时，纳米管释放出高能量的载荷子，使得水分子分解为两种活性成分-氢氧自由基和氢离子。
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。
Astronomers have seen "Einstein rings", formed when light from a distant galaxy is bent by the presence of a nearer massive object, usually another galaxy, that lies directly in its path to Earth.
天文学家们已经观测到了数个“爱因斯坦环”。他们来自遥远的星系，被近处的一个大质量物体(通常是另外一个星系)所弯曲，才来到地球。
Astronomers have seen "Einstein rings", formed when light from a distant galaxy is bent by the presence of a nearer massive object, usually another galaxy, that lies directly in its path to Earth.
天文学家们已经观测到了数个“爱因斯坦环”。他们来自遥远的星系，被近处的一个大质量物体(通常是另外一个星系)所弯曲，才来到地球。
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