The True Origin of Electric Field and Magnetic Field

Classical electromagnetism has long adopted the statement that a changing electric field generates a magnetic field and a changing magnetic field generates an electric field. This statement confuses physical origin and observed appearance and contains a fundamental error in causal logic. This paper first defines the general concept of field. A field refers to the spatial distribution and spatial range of force action. Different types of force correspond to different types of field. Whether a charge stays static or moves, it will generate a spherically symmetric electrostatic field centered on itself. The acting force of electrostatic field decays inversely proportional to the square of distance. A magnetic field cannot be generated by static charge. It can only be generated by moving charge. The magnetic field is the spatial distribution of Lorentz force and presents a cylindrical symmetric concentric vortex structure. The acting force of magnetic field distributes on cylindrical planes perpendicular to the moving direction of charge, and the magnitude of the acting force decays inversely proportional to the first power of distance. Both electric field and magnetic field originate from charge. They are spatial force field effects derived from charge and cannot exist independently without charge entity. An electric field cannot generate a magnetic field, and a magnetic field cannot generate an electric field. There exists no physical mechanism for mutual excitation and alternating propagation of fields in vacuum space without charge. It can be proved that the classical vacuum electromagnetic wave propagation model and the definition that light belongs to alternating electromagnetic field violate physical origin and belong to theoretical hypothesis separated from physical entity.