平面横电磁波模的初值问题

经典理论所描述的电场和磁场处处同相的平面电磁波模并不存在.Maxwell方程组的解依赖于 电磁场的初始值或边界条件，根据不同的初始条件解得的平面电磁波模是不同的.结果表明 ，平面电磁波是横波，在不同的位置，由变化的电场激发的磁场或由变化的磁场激发的电场 振幅不同，电场与磁场的相位差也不同. 关键词： Maxwell方程组 最优微分方程 初始条件 平面电磁波

THE PROBLEM OF INITIAL VALUE FOR THE PLANE TRANSVERSE ELECTROMAGNETIC MODE

There actually does not exist the plane electromagnetic wave described by sutra theory that electric field and magnetic field are in phase everywhere. The solut ion of Maxwell equations depends on the original value of electromagnetic field or boundary conditions. According to different fixed-solution conditions, the p lane electromagnetic modes obtained are different. The results indicate that the plane electromagnetic wave is a transverse wave; at different positions, the a mplitudes of periodically changing magnetic field blazed by periodically changin g electric field are different, so are the amplitudes of periodically changing electric field blazed by periodically changing magnetic field. The phase differe nce between electric field and magnetic field is different too.