第三章电躐辅助菡 Suppose the medium is linear, homogeneous, and isotropic, from Maxwell,s equation we find le:V×(V×E)=V(V.E)-V.VE=V(V.E)-V2E aB V×E V2E at aH a(V×H aD right:V×- V×H=J+ t at at dE (+8 a 8E V·D=p E at t at V·B=0 o-VE=u E at We have VE-ue o a 1 at 8 高等电躐理论 大扩高等电磁场理论 第三章 电磁辅助函数 ( ) ( ) ( ) 2 2 2 2 2 2 2 : 1 ( ) : ( ) 1 : left E E E E E E H H right t t E J t J E t t t J E so E t t                    −      −  =  −          − −         +    = −       −  =   ＝ ＝ ＝ ＝－ － － － Suppose the medium is linear, homogeneous, and isotropic, from Maxwell’s equation we find We have 0 B E t D H J t D B     = −     = +    =   = 2 2 2 E J 1 E t t        − = +   