达朗贝尔方程及其解教学思考

达朗贝尔方程及对应推迟位的解是研究电磁辐射的重要理论基础.因此导出推迟位表达式具有重要意义.而电磁场相关的教材通常都是由方程直接给出达朗贝尔方程的解,即推迟位表达式,缺少推算过程及对结果的举例分析.本文利用半经验公式,即先猜测后验证的方法给出其表达式,并阐明其物理意义,实践证明教学效果有所改善.

Consideration of Teaching on D'Alembert Equations and Its Solution

D′Alembert differential equations and its solution are important theory about electromagnetic radiation, so it is necessary to give hysteresis expression and its effect. Usually, D′Alembert differential equations is presented firstly in teaching material, its solution and expression secondly, and there is lack of concretely calculating process and example analysis. On the basis of half-experience formula, D′Alembert differential equations and its solution are given step by step, including its physical meaning in this paper. Practices show that these processes enhance the quality of teaching and obtain satisfied teaching effects partly.