A radio wave is a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum 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 the atmosphere, making them essential for broadcasting signals. These waves are generated by oscillating electric charges and can be produced by devices like radio transmitters. They can be classified into different frequency bands, such as AM and FM radio, which determine their specific uses and characteristics. Radio waves play a crucial role in modern technology and communication systems.