What effect do radio waves have in communication systems?

Radio waves play a crucial role in communication systems primarily by transmitting information over long distances. This is achieved through the modulation of radio waves, which allows various types of information, such as voice, music, or data, to be encoded onto the carrier signal. Once modulated, radio waves can travel through various mediums, including air, and can cover significant distances, making them ideal for communication technologies like radio, television, and mobile phones.

This capability to transmit information efficiently over vast distances is fundamental to modern telecommunications and allows for wireless communication without the need for physical connections like wires or cables. Hence, the core function of radio waves in communication systems is to effectively relay information from one location to another, making them indispensable to the infrastructure of broadcasting and other forms of communication.