The index of refraction of air is 1.0 while the index of refraction of the polycarbonate is 1.55. 光在空气中的折射率为1.
This speck disrupts the otherwise uniform index of refraction, creating a cloudy spot in a person's field of vision. 这种小颗粒会破坏水晶体原本均质的折射率，在视野中制造出模糊的点。
The index of refraction of most of the common glasses used in optical instruments lies between 1. 46 and 1. 96. 光学仪器中最常用的玻璃其折射率多在1.
But what happens to light in very special media that have a negative index of refraction is currently being hotly debated in leading physics journals and preprints. 不过，最近在几个重要的物理期刊和预印本中，却热烈讨论著光在折射率为负的特殊介质中，会有什麽状况出现。