Poynting's theorem

noun

Poyn·​ting's theorem

ˈpȯintiŋz-

: a statement in electromagnetic theory: the transfer of energy by an electromagnetic wave is at right angles to both electric and magnetic components of the wave vibration and its rate is proportional to the vector product of their amplitudes

Word History

Etymology

after John H. Poynting †1914 English physicist, its originator

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