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汉语拼音：shé shè lǜ

表示介质光学性质的量。某种介质的折射率等于真空中的光速c与光在该介质中传播速度v之比，n=sinisinr=cv。因光在任何介质中的传播速度都小于真空中的光速，所以介质的折射率都大于1。介质2对于介质1的相对折射率等于光在介质1和介质2中传播时的速度之比，n21=sinisinr=v1v2。

• Obviously, the effective index is not just a material property, but depends on the whole waveguide design.

  有效折射率不仅仅是一种材料的性质，它也依赖于整个波导的设计

• Ray tracing also implies that children swimming in a negative-index pool would appear to float above the surface.

  光迹追踪同时也意味著，在充满负折射率材料的池子里游泳的小孩，看起来会像是浮在池面上。

• It is often convenient to use an "effective guide index. "

  采用“波导有效折射率”是方便的。

• In particular, for the TM case, the biaxial nature of nonlinear refractive index is considered without any approximation.

  特别是对于TM波，考虑了非线性折射率的双轴性，没有任何近似。

• Further more, as the dynamic detection range is wide, the device can be used for detecting refractive index of various liquid widely.

  检测动态范围大，可以广泛用于各种液体折射率的检测。

• The technique can image variations in what is known as the refractive index of air - in essence, the speed of light in a given medium.

  这项技术能够使空气折射率图形化-本质上就是特定介质下的光速。

• Optical interference takes place in a thin transparent wedge of refractive index m.

  光的干涉发生在折射率为m的薄的透明的楔形物里。

• That's probably because aragonite has two refractive indices, the extent to which a particular material focuses incoming light.

  这可能是由于碳酸钙晶体具有两种折射率——折射率会限定某种物质聚焦入射光线的范围。

• The choices are a simple exponential index variation from the interface layer, an exponential plus a sloping base, and a free profile.

  其选择是来自界面层的简单的指数折射率变化，一个指数加倾斜的基底和一个自由的分布。