Poynting's vector

A vector, the outward normal component of which, when integrated over a closed surface in an electromagnetic field, represents the outward flow of energy through that surface. It is given by the equation below, where E is the electric field strength, H the magnetic field strength, B the magnetic flux density, and μ the permeability.

When an electromagnetic wave is incident on a conducting or absorbing surface, theory predicts that it should exert a force on the surface in the direction of the difference between the incident and the reflected Poynting's vector. See Electric field, Electromagnetic radiation, Maxwell's equations, Radiation pressure

单词	poynting's vector
释义	Poynting's vector Poynting's vector A vector, the outward normal component of which, when integrated over a closed surface in an electromagnetic field, represents the outward flow of energy through that surface. It is given by the equation below, where E is the electric field strength, H the magnetic field strength, B the magnetic flux density, and μ the permeability. When an electromagnetic wave is incident on a conducting or absorbing surface, theory predicts that it should exert a force on the surface in the direction of the difference between the incident and the reflected Poynting's vector. See Electric field, Electromagnetic radiation, Maxwell's equations, Radiation pressure
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