本文根据菲涅耳公式讨论了一束线偏振光垂直入射于波晶片时，在计反射而不计吸收的情况下，在单轴晶体内被 分解的寻常光和非常光的振幅及强度问题.同时，推导了线偏振光透过波晶片后光波的振幅、强度和透过率的表达式，通过将 其与目前流行的教材所给出的不计反射的表达式进行比较，揭示了不仅有数值大小上的差异，而且还有光的偏振方向和光的 强度关系等差异.

Based on the Fresnel formula，the general amplitude and intensity of ordinary light ( i.e. o-light) and extraordinary light ( i.e. e-light) from a linear polarized beam incident in a wave wafer under considering reflection without absorption are obtained，and further discussion and concrete comparisons from a linear polarized beam vertical incident in a wave wafer are presented. In addition，the amplitude，intensity and transmission rate after the light penetrating wave wafer are discussed. In comparison with the amplitude and intensity without considering the reflection given by dominating textbooks，we have found that there are not only numerical differences but also differences in knowledge content.