Electric and magnetic fields

Electric and magnetic fields are fundamental forces responsible for generating and transmitting electromagnetic radiation, including visible light.

  • All forms of light consist of both electric and magnetic fields oscillating perpendicular to each other and to their direction of propagation.
  • Descriptions of light, whether in terms of electromagnetic waves or photons, result from the interaction of electric and magnetic fields.
  • When changes in electric and magnetic fields result in electromagnetic waves, they produce synchronized oscillations that travel at right angles to each other at the speed of light  (299,792 kilometres per second).