折射率

例句：

1. 1. The optics of the lens are crucial for determining its refractive properties.
   透镜的光学性质对于确定其折射属性至关重要。
2. 2. The scientist used a high-precision instrument to measure the refractive index of the material.
   科学家使用高精度仪器测量了材料的折射指数。
3. 3. The researcher found that the refractive index of the liquid could be adjusted by adding different substances.
   研究人员发现，通过加入不同物质，液体的折射指数可以被调整。