The animation shows a hypothetical mechanical device
that separates electric charge to produce an electric
dipole. Initially, we have a negative and postive
charge on top of each other. There is no net charge
and no electric field anywhere in space. Each charge
is connected to a rod, and the rods are pulled apart.
As the rods are pulled apart to their
maximum extent, the charges are separated slightly.
This separation takes place over a time T, after which
the charges remain a fixed distance apart. This
separation generates electric field. Initally we see
pulse of radiation of radial extent cT that propogates
outward at the speed of light. Once that pulse
disappears, we have left the classice static electric