Electrodynamics MOC

Poynting vector

The Poynting vector is a vector quantity representing a flow of electromagnetic energy at a point, defined by

⃗𝐒=1𝜇0⃗𝐄×⃗𝐁

To see how this represents energy flow, see Poynting's theorem. The Poynting vector is related to Electromagnetic momentum density by

⃗𝐠=𝜖0𝜇0⃗𝐒


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