电磁能量-动量转化和守恒定律四维形式的一种推导  

A derivation of the four-dimensional form of the law on theelectromagnetic energy-momentum transformation and conservation

作　　者：李子军[1] 杨尚明[1] 钟玉荣[1] 王子安[2] 李作宏[1] 崔建营[1] 

机构地区：[1]烟台大学光电学院,山东烟台264005 [2]内蒙古民族大学物理系,内蒙古通辽028043

出　　处：《大学物理》2004年第10期17-20,24,共5页College Physics

基　　金：山东省自然科学基金资助项目(Y2003A01)

摘　　要：定义了电磁场的四维动量流密度张量,并将电磁能量转化和守恒定律及动量转化和守恒定律写成了四维协变形式.给出了三维电磁能量密度、能流密度、动量密度和动量流密度关于两个惯性系之间的变换关系.还给出了四维动量流密度张量与四维电磁场张量之间的依赖关系.The four-dimensional momentum current density tensor of electromagnetic field is defined. Both law of the electromagnetic energy transformation and conservation and law of the electromagnetic momentum transformation and conservation are written into four-dimensional covariant form. It is given that transformation relation on the three-dimensional electromagnetic energy density and energy current density and momentum density and momentum current density concerning two inertial system. The dependence relation of four-dimensional momentum current density tensor with four-dimensional electromagnetic field tensor is also presented.

关 键 词：四维动量流密度张量 能量转化和守恒定律 动量转化和守恒定律 四维形式 变换关系 

分 类 号：O442[理学—电磁学]