本章所研究的问题是电磁波的辐射。方法和稳恒场情况一样,当考虑由电荷、电流分布激发电磁场的问题时,引入势的概念来描述电磁场比较方便。本章首先把势的概念推广到一般变化电磁场情况,然后通过势来解辐射问题。 §5. 1 电磁场的矢势和标势 Vector and Scalar Potential of Electromagnetic §5.2 推迟势 Retarded Potential §5.3 电偶极辐射 Electric Dipole Radiation §5.4 磁偶极辐射和电四极辐射 Radiation of Magnetic Dipole and Electric Quadrupole §5.6 电磁波的干涉和衍射 Interference and Diffraction Phenomenon of Electromagnetic Wave §5.7 电磁场的动量 Momentum of Electromagnetic Field