%0 Journal Article %A Fernández-Rañada, Antonio %T Two properties of electromagnetic knots %D 1997 %@ 0375-9601 %U https://hdl.handle.net/20.500.14352/58981 %X We prove two properties of the electromagnetic knots in empty space. First, that any standard radiation fields (i.e. satisfying E . B = 0) coincide locally with an electromagnetic knot. Second, that the electric and magnetic helicities of any knot are equal. These results can be used as a basis for a topological model of electromagnetism. %~