We present examples of simple electromagnetic systems in which energy, linear momentum, and angular momentum exhibit interesting behavior. The systems are sufficiently simple to allow exact solutions of Maxwell’s equations in conjunction with the electrodynamic laws of force, torque, energy, and momentum. In all the cases examined, conservation of energy and momentum is confirmed.
Masud Mansuripur, "Energy and linear and angular momenta in simple electromagnetic systems," Proc. SPIE 9548, Optical Trapping and Optical Micromanipulation XII, 95480K (Presented at SPIE Nanoscience + Engineering: August 10, 2015; Published: 25 August 2015); https://doi.org/10.1117/12.2187550.
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