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Electromagnetic field - The electromagnetic field as a feedback loop | | Electromagnetic field - The electromagnetic field as a feedback loop: Encyclopedia II - Electromagnetic field - The electromagnetic field as a feedback loop | | The behavior of the electromagnetic field can be resolved into four different parts of a loop: (1) the electric and magnetic fields are generated by electric charges, (2) the electric and magnetic fields interact only with each other, (3) the electric and magnetic fields produce forces on electric charges, (4) the electric charges move in space.
The feedback loop can be summarized in a list, including phenomena belonging to each part of the loop:
charges generate fields
Gauss's law Coulomb's law: charges generate ...
See also:Electromagnetic field, Electromagnetic field - Behavior of the electromagnetic fields, Electromagnetic field - Incompressible fluids, Electromagnetic field - Source and Sinks, Electromagnetic field - The two fluids, Electromagnetic field - The vortex, Electromagnetic field - Summary, Electromagnetic field - Negative Feedback Loop, Electromagnetic field - Positive Feedback Loop, Electromagnetic field - Flaw in the velocity field interpretation, Electromagnetic field - The field as a stream of moving photons, Electromagnetic field - Light and electromagnetic waves, Electromagnetic field - The electromagnetic field as a feedback loop | | | Electromagnetic field, Electromagnetic field - Behavior of the electromagnetic fields, Electromagnetic field - Flaw in the velocity field interpretation, Electromagnetic field - Incompressible fluids, Electromagnetic field - Light and electromagnetic waves, Electromagnetic field - Negative Feedback Loop, Electromagnetic field - Positive Feedback Loop, Electromagnetic field - Source and Sinks, Electromagnetic field - Summary, Electromagnetic field - The electromagnetic field as a feedback loop, Electromagnetic field - The field as a stream of moving photons, Electromagnetic field - The two fluids, Electromagnetic field - The vortex, antenna, bremsstrahlung, Classification of electromagnetic fields, Closed waveguide, Coulomb's law, electric field, electrodynamics, electromagnetic interaction*, electromagnetic radiation, electromagnetic radiation hazard, electromagnetic spectroscopy, electromagnetic spectrum, far-field region, Flux, Fresnel zone, Fresnel equations, holography, intensity, list of environment topics, Magneto-optic effect, Mode field diameter, Near-field region, perinormal phenomenon, photoelectric effect, Radiometry, Speckle pattern, Surface wave | | |
| | | Electromagnetic field: Encyclopedia II - Electromagnetic field - The electromagnetic field as a feedback loop
Electromagnetic field - The electromagnetic field as a feedback loop
The behavior of the electromagnetic field can be resolved into four different parts of a loop: (1) the electric and magnetic fields are generated by electric charges, (2) the electric and magnetic fields interact only with each other, (3) the electric and magnetic fields produce forces on electric charges, (4) the electric charges move in space.
The feedback loop can be summarized in a list, including phenomena belonging to each part of the loop:
- charges generate fields
- Gauss's law Coulomb's law: charges generate electric fields
- Ampère's law: currents generate magnetic fields ()
- the fields interact with each other
- displacement current: changing electric field acts like a current, generating vortex of magnetic field
- Faraday induction: changing magnetic field induces (negative) vortex of electric field
- Lenz's law: negative feedback loop between electric and magnetic fields
- Maxwell-Hertz equations: simplified version of Maxwell's equations
- electromagnetic wave equation
- fields act upon charges
- Lorentz force: force due to electromagnetic field
- electric force: same direction as electric field
- magnetic force: perpendicular both to magnetic field and to velocity of charge ()
- charges move
- continuity equation: current is movement of charges
Phenomena in the list are marked with a star () if they consist of magnetic fields and moving charges which can be reduced by suitable Lorentz transformations to electric fields and static charges. This means that the magnetic field ends up being (conceptually) reduced to an appendage of the electric field, i.e. something which interacts with reality only indirectly through the electric field.
Other related archivesAmpère's law, Classification of electromagnetic fields, Closed waveguide, Coulomb's law, Einstein, Electric charges, Faraday induction, Flux, Fresnel equations, Fresnel zone, Gauss's law, Lenz's law, Lorentz force, Lorentz transformations, Magneto-optic, Maxwell's equations, Michelson-Morley experiment, Mode field diameter, Near-field region, Poynting vectors, Protons, Radiometry, Speckle pattern, Surface wave, acceleration, anisotropic, antenna, boost, bremsstrahlung, conservation of energy, continuity equation, displacement current, electric field, electrodynamics, electromagnetic interaction, electromagnetic radiation, electromagnetic radiation hazard, electromagnetic spectroscopy, electromagnetic spectrum, electromagnetic wave, electron, electrostatic field, far-field region, fields, flux, harmonic, holography, hydrodynamic, incompressible fluids, inertial motion, intensity, invariant, lens, light, list of environment topics, luminiferous aether, magnetic charges, magnetic field, magnetostatic field, medium, negative feedback, no sources or sinks, oscillating, paradoxically, perinormal phenomenon, photoelectric effect, photonic, positive feedback, principle of relativity, quantum electrodynamic, quantum electrodynamics, right hand rule, sources or sinks, space, special relativity, speed, speed of light, tensor field, theory of relativity, vector, vectors, velocity, vortex, vortical, wave equation
 Adapted from the Wikipedia article "The electromagnetic field as a feedback loop", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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