当光波由光疏介质进入到光密介质时，即n1<n2，随着入射角发生变化，其振幅反射系数、振幅反射率（透过率）强度反射率（透过率）和能流反射率（透过率）均会发生相应的变化。例子给出平面光波从空气（折射率n1=1）入射到石英玻璃中（折射率n2=1.45)时，用matlab作出p、s分量的振幅反射率和振幅透射率以及它们的绝对值随入射角度的变化曲线。(When the light waves from the light medium into the light medium, that is, n1<n2, as the incident angle changes, the amplitude reflection coefficient, the amplitude reflectivity (transmittance) intensity reflectivity (transmittance) and the energy flow reflectivity (transmittance) change correspondingly. In this example, when a plane light wave is incident from an air (refractive index n1=1) into a quartz glass (refractive index n2=1.45), the amplitude reflectivity and amplitude transmittance of the P, s components and their absolute values with the angle of incidence are calculated by MATLAB.)