摘要:本文主要根据经典力学、电磁学的知识和经典色散理论导出了介质分界面处电磁波的色散关系。分别从经典电子论和经典色散理论出发计算出电磁波的色散规律。文章结合因果律对电磁波的色散关系，通过因果律及其响应函数的研究，把因果律应用于电磁波中的色散现象，推导出一些具体的色散关系，并对因果律及色散关系的相关问题进行了讨论。

关键词：电子；介质；电磁波；折射率；色散；因果律；响应函数

Abstract:Based on the classical mechanics, the electromagnetism knowledge and the classic dispersion theory, the dispersion relations of electromagnetic wave are derived at the interface of media in the paper. Moreover, the wave dispersion laws are obtained from the classical electronic theory and the classical dispersion theory. Through the study of the causality and the response function, some specific dispersion relations are deduced and some related issues are discussed as well.

Key words: Electron; Media; Electromagnetic wave; Refractive index; Dispersion; Causality; Response function