Some properties of radio waves, which are a type of electromagnetic radiation, are that they have the longest wavelengths and the shortest frequencies on the electromagnetic spectrum, The wavelengths of radio waves are greater than 4 inches. Radio waves also can be subdivided into different groups that include long- and short-radio waves.
Radio waves are used commonly for communication purposes. Short-radio waves can have wavelengths between 4 inches and 33 feet while the wavelengths of long-radio waves are greater than 33 feet. AM radio is an example of long-radio waves, and short-radio waves are used for televisions. Radio waves have other applications, such as for military and civilian aircraft communication.