poynting vector

Fetched 2026-10-26 (cache).

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Noun

1. {{lb|en|electromagnetism}} The vector obtained in the direction of a right-hand screw from the cross product ([[vector product]]) of the electric field vector rotated into the magnetic field vector of an electromagnetic wave. Note: The Poynting vector, with transmission media parameters and constants, gives the [[irradiance]] and direction of propagation of the electromagnetic wave. Mathematically: <math>\vec P = \vec E \times \vec H</math>.

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