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  2. Mathematical descriptions of the electromagnetic field

    en.wikipedia.org/wiki/Mathematical_descriptions...

    Here d denotes the exterior derivative – a natural coordinate- and metric-independent differential operator acting on forms, and the (dual) Hodge star operator is a linear transformation from the space of 2-forms to the space of (4 − 2)-forms defined by the metric in Minkowski space (in four dimensions even by any metric conformal to this ...

  3. List of electromagnetism equations - Wikipedia

    en.wikipedia.org/wiki/List_of_electromagnetism...

    Continuous charge distribution. The volume charge density ρ is the amount of charge per unit volume (cube), surface charge density σ is amount per unit surface area (circle) with outward unit normal nĚ‚, d is the dipole moment between two point charges, the volume density of these is the polarization density P.

  4. Surface equivalence principle - Wikipedia

    en.wikipedia.org/wiki/Surface_equivalence_principle

    It has also been used as a domain decomposition method for method of moments analysis of complex antenna structures. [11] Schelkunoff's formulation is employed particularly for scattering problems. [2] [12] [13] [14] The principle has also been used in the analysis design of metamaterials such as Huygens’ metasurfaces [15] [16] and plasmonic ...

  5. Permeability (electromagnetism) - Wikipedia

    en.wikipedia.org/wiki/Permeability...

    The permeability of vacuum (also known as permeability of free space) is a physical constant, denoted μ 0. The SI units of μ are volt-seconds per ampere-meter, equivalently henry per meter. Typically μ would be a scalar, but for an anisotropic material, μ could be a second rank tensor .

  6. Electromagnetism - Wikipedia

    en.wikipedia.org/wiki/Electromagnetism

    The electromagnetic force is one of the four fundamental forces of nature. It is the dominant force in the interactions of atoms and molecules. Electromagnetism can be thought of as a combination of electrostatics and magnetism, which are distinct but closely intertwined phenomena. Electromagnetic forces occur between any two charged particles.

  7. Category:Electromagnetism - Wikipedia

    en.wikipedia.org/wiki/Category:Electromagnetism

    Download as PDF; Printable version; ... Electromagnetism is the set of phenomena associated with ... Impedance of free space; Inhomogeneous electromagnetic wave ...

  8. Jefimenko's equations - Wikipedia

    en.wikipedia.org/wiki/Jefimenko's_equations

    In electromagnetism, Jefimenko's equations (named after Oleg D. Jefimenko) give the electric field and magnetic field due to a distribution of electric charges and electric current in space, that takes into account the propagation delay (retarded time) of the fields due to the finite speed of light and relativistic effects.

  9. Electromagnetic tensor - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_tensor

    The electromagnetic tensor, conventionally labelled F, is defined as the exterior derivative of the electromagnetic four-potential, A, a differential 1-form: [1] [2] = . Therefore, F is a differential 2-form— an antisymmetric rank-2 tensor field—on Minkowski space. In component form,