Poynting theorem

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Poynting theorem

(ˈpɔɪntɪŋ)
n
(General Physics) the theorem that the rate of flow of electromagnetic energy through unit area is equal to the Poynting vector, i.e. the cross product of the electric and magnetic field intensities
[C19: named after John Henry Poynting (1852–1914), English physicist]
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Starting with Newton's law, this book also examines Maxwell's equations and subsidiary equations such as continuity, constitutive relations and the Lorentz transformation; Helmholtz' theorem, and Poynting's theorem, among other methods for understanding this interaction.