elektromagnetvälja
The electromagnetic field is a fundamental physical field describing how electric charges and currents interact. Classical electromagnetism expresses the field through Maxwell's equations, which relate the electric field E, the magnetic field B, charge density ρ, and current density J. The Lorentz force F = q(E + v × B) governs how charges move in the field. The E and B components are interrelated and can propagate as electromagnetic waves at the speed of light in vacuum, c ≈ 3.00 × 10^8 m/s. The field stores energy with density u = (ε0 E^2 + B^2/μ0)/2, and the energy flow is described by the Poynting vector S = (1/μ0) E × B.
In materials the field interacts via permittivity ε and permeability μ, which determine the refractive index n. The
In Swedish, elektromagnetfält is the standard term for the electromagnetic field; elektromagnetvälja appears to be a