Radio waves are part of the electromagnetic spectrum. They can travel through the air, reflect off the ionosphere (for shortwave), or be relayed by satellites, allowing signals to reach far beyond the transmitter’s location.
At night, changes in the ionosphere reflect AM signals more effectively, letting them travel farther with less interference. That’s why you can sometimes hear stations from hundreds of miles away after sunset.
AM (Amplitude Modulation): Better range but lower sound quality.
FM (Frequency Modulation): Clearer sound but shorter range.
Digital Radio (DAB/HD): Offers higher quality audio and extra channels, but requires compatible receivers.
