8.3 Magnetic Monopole? The property V. B=0 means that the magnetic fields are solely due to current and the magnetic " charges"do not exist In 1931 Dirac postulated magnetic mono-poles So far they have not been observed experimentall Remarks 1)Theoretically we can introduce monopole in the elec- tromagnetism In yang- Mills theory for Weak-Electro Interactions the existence of monopoles is predicted But they have not been found either