What source does radio use to transmit?

Radio transmits using electromagnetic waves, specifically radio waves, which are a type of non-ionizing radiation. These waves are generated by oscillating electrical currents and can travel through the air, allowing for the broadcast of audio signals over varying distances. The transmission occurs through antennas, which convert electrical signals into radio waves and vice versa. This enables the reception of sound, such as music and speech, by radio receivers tuned to specific frequencies.