Poynting Vector

Claimed by Tanner Shaw (tshaw30)

The Poynting vector represents the direction and magnitude of the flux in energy from an electromagnetic field. It was originally discovered by John Henry Poynting in 1884.

The Main Idea

The poynting vector describes the magnitude and direction of the flux in energy from an electromagnetic field.

A Mathematical Model

A graphical representation of the poynting vector

The poynting vector can be derived by the equation [math]\displaystyle{ \vec{S} = {\frac{1}{μ_0}}\vec{E}\times\vec{B} }[/math] where E is the electric field vector, and B is the magnetic field vector, and μ₀ is the magnetic constant.

A Computational Model

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Examples

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History

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John Henry Poynting, an English physicist and professor, was the first to derive the equation that described the direction of electromagnetic flux. His work for the equation was published in 1884. Nikolay Umov and Oliver Heaviside both independently discovered the poynting vector as well.

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