这就为研究激光的工作人员出了一个难题：如果能量输出有两种形式，他们怎样运用电荷守恒和能量守恒定律呢？
This posed a conundrum for researchers working with the laser: How were they to apply the laws of conservation of charge and conservation of energy with two forms of energy output?
能量守恒定律也获得简单的形式。
本文从安培环路定理、高斯定理及电荷守恒定律出发导出了位移电流的具体形式。并对位移电流作了简单的讨论。
Based on the ampere return circuit theorem, gauss theorem and charge conservation law the concrete form of displacement current is derived. The displacement current is discussed.
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