Electromagnetic field

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The electromagnetic field is composed of two related vectorial fields, the electric field and the magnetic field. This means that the vectors (E and B that characterize the field have a value defined at each point of space and time. If only E, the electrical field, is nonzero and is constant in time, the field is said to be an electrostatic field.

The behaviour of electromagnetic fields can be described with Maxwell's equations, and their quantum basis by quantum electrodynamics.