This would be very useful for physics students.
Do you mean beyond THIS ?
Yes, I’d like an animation that shows the electric and magnetic field intensities in 3-d, perhaps by having arrows of different length.
I think this is the exact demo that you are looking for. You can find the attached notebook from the same example in the link.
After thinking about it, I’d like to see an animation done with VectorPlot3D, of the radiation field from an oscillating electron (dipole radiation).