相对论性能心守恒定律的例证
Illustrations of the Relativistic Conservation Law for the Center of Energy
摘要：
回顾了涉及能量中心的相对论性守恒定律，并使用经典电磁理论中的简单例子加以说明。需要强调的是，这一守恒定律与电磁理论庞加莱群生成元中的能量、线性动量和能量守恒定律平行;然而，这一反映能量连续流动的相对论定律在教科书中几乎没有提及。这里的插图呈现了存在和不存在外力的情况。包括平行板电容器、扁平滑动接头螺线管和两个相互作用的电荷的情况。
英文摘要：
The relativistic conservation law involving the center of energy is reviewed and illustrated using simple examples from classical electromagnetic theory. It is emphasized that this conservation law is parallel to the conservation laws for energy, linear momentum, and energy, in arising from the generators of the Poincare group for electromagnetic theory; yet this relativistic law reflecting the continuous flow of energy goes virtually unmentioned in the text books. The illustrations here present situations both where external forces are present and are absent. The cases of a parallel plate capacitor, a flattened slip-joint solenoid, and two interacting charges are included.
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