相对论电磁力矩密度矢量

Relativistic Electromagnetic Momentum Density Vector

导出了相对论电磁力矩密度矢量 ,由此可以在任何惯性系中计算电磁场中匀速运动的电磁极化介质的电磁力矩密度 .结果发现 :在垂直介质运动方向上 ,有电场强度对磁化强度、磁感应强度对电极化强度的交叉耦合力矩密度存在 ;在平行介质运动方向上 ,电磁力矩密度有膨胀 .

The electromagnetic momentum density of the electromagnetic polarization medium with uniform motion was calculated on the basis of the relativistic electromagnetic momentum density was derived in electromagnetic field in any inertia system.The result was that so-called cross-coupling momentum density of electric fiedld to magnetization and magnetic field to electric polarization exists in the direction vertical to the motion of the medium and the dilation of the electromagnetic momentum density exists in the direction parallel to the motion of the medium.