Electromagnetic Waves.

11 lessons93 min5 simulations10 practice questions

A changing magnetic field makes an electric field; this chapter adds the reverse, that a changing electric field makes a magnetic field. Maxwell's displacement current repairs Ampere's law for a charging capacitor, completes the four Maxwell equations and predicts waves of coupled E and B fields that travel at the speed of light. The chapter then describes these waves and walks through the whole electromagnetic spectrum, from radio waves to gamma rays.

Also called: EM waves · electromagnetic spectrum · displacement current