A radio wave is a type of electromagnetic radiation with wavelengths longer than infrared light. They are used for various forms of communication, including radio, television, and cellular networks. Radio waves can travel long distances and can penetrate through buildings, making them ideal for transmitting information. These waves are generated by oscillating electric charges and can be produced by devices like radio transmitters. The frequency of a radio wave determines its properties and how it interacts with the environment. Different frequencies are used for different applications, such as AM and FM broadcasting.