Question #edf8b
1 Answer
Aug 30, 2017
In electromagnetic theory, the Poynting vector describes the flow of energy per unit area in unit time in an electromagnetic field.
It may be defined as (in free space),
It points in the direction of flow of energy.
It arises in the Poynting's theorem which expresses energy conservation in electromagnetic theory,
Where,
This is the analog of continuity equation in electromagnetic theory.