Radio is a communication system that uses invisible radio waves to transmit voices, music, and data from one place to another. Radio has a long history, with many of the earliest experiments in wireless communication taking place in the late 19th century. Radio has come a long way since then, and is now used for a wide variety of applications, from broadcasting news and entertainment to providing critical data for navigation and weather forecasts. Radio technology works by encoding sound and other information into electromagnetic waves that can travel long distances in the air. These waves are received by radios, either in our homes or cars, which then decode the signal and turn it into audio again.