radio theory

Radio theory involves how electromagnetic waves are used to transmit information wirelessly. These waves are generated by a transmitter, which creates oscillating electric and magnetic fields. When sent through the air, they travel at the speed of light and can carry sound, data, or images. A receiver picks up these waves, converts them back into usable signals like music or speech. Key concepts include frequency (which determines station channels), modulation (how information is embedded in the wave), and antennas (which transmit and receive signals). Essentially, radio theory governs how unseen waves carry information across distances without physical wires.