Representations of electric and magnetic fields

We propose for the graphical representation of fields not to limit ourselve s to field lines but also to draw the orthogonal surfaces. Just as the ends of the electric or magnetic field lines tell us where the sources of the f lux of a field are located, the borders of the orthogonal surfaces indicate to us the sources of the field's circulation. (C) 2000 American Associatio n of Physics Teachers.