I did some research into Heinrich Hertz and read some interesting things about his discovery of the radio wave. In 1886, Hertz became the first person ever to transmit and receive controlled radio waves. Hertz’s research was solely based on aiming to discover if James Clerk Maxwell’s 1864 theory of electromagnetism was correct. Hertz would generate sparks using a piece of electrical equipment called an ‘induction coil’ which led him to discover the production of regular electrical waves, whose behaviour was predictable.
Here’s a small clip highlighting Hertz’s discovery of radio waves: