Snell's law

例句：

1. 1.The Snell's law of refraction explains how light bends when it passes through a medium with different refractive indices.
   斯内尔折射定律解释了光在通过具有不同折射率的介质时如何弯曲。
2. 2. In Snell's law, the speed of light is constant and does not change with the angle of incidence.
   根据斯内尔定律，光速是恒定的，与入射角无关。
3. 3. Snell's law is used to calculate the angle of reflection at a boundary surface where two mediahave different refractive indices.
   斯内尔定律用于计算两种具有不同折射率的介质边界表面的反射角度。