What is the size of the smallest magnetic charge a magnetic monopole can have? And why are magnetic charges quantized inversely to electric charges? Also,can two oppositely charged magnetic monopoles exist as dipoles like for example + -.And what wavelength of radiation would such a dipole absorb? How do monopoles cancel out the galactic magnetic field (if monopoles existed in large numbers,apparently,this would happen.A magnetic dipole of the type I have mentioned would not cancel out a magnetic field,would it)? And why is it generally considered that there would be monopoles in space and not dipoles (electric charges tend to stay togther)?