Radio wave

Radio waves were part of the electromagnetic spectrum which could only be detected with radios.

Pulsars emitted powerful beams of energy in the form of radio waves. (PROSE: Ghost Devices)

The Daleks could convert radio waves into light waves so that they could see anything that was happening around them, even millions of miles away. (COMIC: City of the Daleks) One Dalek Emperor could read thoughts through radio waves. (COMIC: The Brain Tappers)

In October 1963, Susan Foreman suffered from headaches caused by a hypersonic signal being transmitted over radio waves. (AUDIO: Hunters of Earth)

Professor Neob Frankel provided Kurt Wurlitzer with a rubber spacecraft which was designed to absorb radio waves. (COMIC: Operation Wurlitzer)

Star whales transmitted their song as radio waves. (AUDIO: The Song of Megaptera)