摘要
本文利用指标表示法推导了电磁场的能量、动量和角动量守恒定律,其特点是:物理思想清晰,推导目的明确;物理量引入自然、意义明了;数学运算方便,难度相对较低.
This paper uses the index notation to derive the laws of conservation of energy,momentum and angular momentum of the electromagnetic field,which is characterized by clear physical ideas and unequivocal direction of derivation;natural introduction and intelligible meaning of physical quantities;convenient mathematical operations and relatively low difficulty.
作者
李照宇
LI Zhao-yu(School of Physics and Electronic Science,Hunan Institute of Science and Technology,Yueyang,Hunan 414006,China)
出处
《大学物理》
2023年第9期16-19,共4页
College Physics
基金
湖南省自然科学基金(2021JJ40223)
湖南省教育厅科研项目(20C0908)资助。
关键词
指标法
电磁场
能量守恒律
动量守恒律
角动量守恒律
index notation
electromagnetic field
conservation law of energy
conservation law of momentum
conservation law of angular momentum
