#S27 Field energy and field momentum
Richard Feynman
Jonathan
May 14, 202631 January 1963Caltech, Pasadena CA
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Summary
A physics lecture derives the electromagnetic field energy density and Poynting vector from Maxwell’s equations, emphasizing local conservation of energy and momentum. It then illustrates these ideas with examples such as light, a charging capacitor, resistive wire, and static charge-magnet configurations, while noting subtleties in notation and relativistic sign conventions.
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