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。
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。