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| 81. | This is what you see when you break up a beam of light with a prism. |
| 这就是你用棱镜分解一束光时所看到的东西。 |
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| 82. | a beam of light passing through it is brought to a point or focus. |
| 光束通过它时能够汇聚成一点。 |
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| 83. | The energy source for laser beam machining is a highly concentrated beam of light. |
| 激光切削的能量来源于一束高聚焦光。 |
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| 84. | a plastic film that can polarize a beam of light; often used in sunglasses to eliminate glare. |
| 可以使光束偏振的一种塑料薄膜；使用时通常戴着太阳镜来挡住耀眼的光。 |
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| 85. | a light source with reflectors that projects a beam of light in a particular direction. |
| 装有能投射到某一特定方向一束光的反射镜的灯。 |
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| 86. | Because gas lasers were often used as the light source, their beam had to be coupled into the thin-film |
| 由于气体激光器常用作光源，故必须将其光束耦合到薄膜波导中去。 |
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| 87. | a parallel beam of light passing through it is caused to diverge or spread out. |
| 平行光束通过它能够发散或展开。 |
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| 88. | The beam of light is focused on the object under the microscope that is to be studied . |
| 在显微镜下，光线聚集在我们要研究的物体上。 |
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| 89. | Where there is nothing in the path of the beam of light, nothing is seen. |
| 如果光束轨迹上没有东西，就什么也看不出来。 |
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| 90. | Laser light enters the beam splitter, and the beam splitter sends half of the light down one arm and |
| 激光进入分束器后，分束器将光分为两半后分别送往两臂。 |
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