[dleviwing]

Hi Mike;
The concept of monopole comes into effect due to the fact that Dirac did not impose a limit function into his equations that represented the limits of nature and reality. Of course he was not aware of these limits any more than modern science is today.

To create a minimal magnetic effect, it requires two rotating subatomic particles with their axes oriented in opposite directions; thus it requires two magnetic moments to produce the effect of a magnetic field phenomena. This should not be confused with the electromagnetic wave phenomena that Dirac was concerned with.

Best wishes;
Dave