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Magnetic monopole

Stan Zurek, Magnetic monopole, Encyclopedia-Magnetica.com, {accessed 2020-12-05}

Definition

Magnetic monopole - a hypothetical entity proposed on the basis of theoretical calculations, and duality to electric monopoles.


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Animation of field lines around a magnetic dipole and an electric dipole

by Geek3, CC-BY-SA-3.0

Gauss's law for magnetic field is often given in a differential form:

$$ \nabla · B = 0 $$

where: ∇ denotes divergence, and $B$ is the magnetic flux density.

As a consequence of this equation there should be no “magnetic charge” or magnetic monopole, and all magnetic fields should be produced by magnetic dipoles.

However, Paul Dirac showed theoretically that the existence of magnetic monopoles would explain why the electric charge is quantised, which so far also remains unexplained.1)

The search for magnetic monopole continues and so far no evidence was found for its existence.

See also

References

magnetic_monopole.txt · Last modified: 2020/07/19 01:27 by stan_zurek

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