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(一)引言菲涅耳公式是光在两种介质分界面上所表现的电磁特性的基本公式,它不仅包括了反射定律、折射定律和布儒斯特定律,还可以进一步说明反射光和折射光的强度、偏振状态、全反射以及反射光与入射光的位相关系,并可用以测量介质的折射率。有些高等学校如北大已经排出验证这一公式的实验。其方法是对反射光强和入射光强分别进行测量,在这种情况下,入射光强能否保持恒定,对实验关系很大。一般情况下,光源
(A) Introduction Fresnel formula is the basic formula of the electromagnetic properties of light at the interface of two kinds of medium, which not only includes the reflection law, refraction law and Brewster’s law, but also can further explain the reflected light and refracted light The intensity, polarization state, total reflection, and reflected light and incident light phase relationship, and can be used to measure the refractive index of the medium. Some colleges and universities, such as Peking University, have excreted experiments to verify this formula. The method is to measure the reflected light intensity and incident light intensity respectively. In this case, whether the incident light intensity can be kept constant or not depends on the experiment. Under normal circumstances, the light source