Final answer:
Radio waves are electromagnetic waves that propagate through the interaction of electric and magnetic fields, both of which are perpendicular to each other and to the direction of wave propagation.
Step-by-step explanation:
Radio waves are a type of electromagnetic wave that propagates through the interaction of two fields: an electric field and a magnetic field. These two fields are perpendicular to each other and to the direction of the wave's propagation, which creates a transverse wave.
In the context of broadcast antennae, like those used for radio and TV stations, these electromagnetic waves are generated when electrons in the antenna oscillate, creating alternating electric and magnetic fields that propagate through space.
The concept of radio waves and their propagation can be explored through virtual physics simulations such as the PhET Interactive Simulations, where one can visualize how the electric and magnetic fields are related and propagate outward from a broadcast antenna.