2005/07/04 | 角动量密度[Angular Momentum Density]
类别(Ω〖物理〗) | 评论(0) | 阅读(30) | 发表于 20:33
For an electromagnetic wave, the angular momentum density is defined in cgs as


where r is the position vector, is the momentum density, c is the speed of light, E is the electric field, and B is the magnetic field.
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