refraction

剑桥词典

the fact of light or sound being caused to change direction or to separate when it travels through water , glass , etc.
折射
 absolute index of refraction

a calculation of the relationship between the speed of light moving through a medium (= substance ) and the speed of light in a vacuum (= an area with no matter in it)
绝对折射率
 angle of refraction

the angle that a beam of light or other energy that is refracted by a surface makes with a line vertical to that surface
折射角 返回 refraction