What are the two components of a radio wave?

Radio waves are a form of electromagnetic radiation. As the term 'electromagnetic' directly suggests, these waves are composed of two distinct components: an electric field and a magnetic field. When alternating current flows through a physical antenna, it generates these two fields. Once radiated, they propagate outward through space together, oscillating at right angles to one another and at right angles to their direction of travel. While voltage, current, impedance, and reactance are all vital concepts for the physical wiring and antenna circuits that produce the signal, the radiated wave itself in free space consists solely of the oscillating electric and magnetic fields.