what would a magnetic field look like in 4+1D? In 3+1D the field lines simply rotate around the axis which points along the direction of motion of the electron. But in 4+1D this is not defined. But if magnetism is simply a result of relativity then there should be a way to make the equations work in 4+1D. Surely someone somewhere must have worked this out by now. maybe instead of 'lines' of force one would instead use 'planes' of force??