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Radio

Radio is a technology that uses electromagnetic waves to transmit and receive audio signals over distances. It operates by encoding sound onto carrier waves, which can then be transmitted through the air and picked up by receivers. The received signals are decoded back into sound, allowing for the broadcast of music, news, talk shows, and other forms of entertainment or information.

Radio communication can occur in various forms, including AM (Amplitude Modulation) and FM (Frequency Modulation), which differ in how they encode the audio signal onto the carrier wave. Additionally, radio can refer to various applications, such as two-way radio used in communications, as well as satellite radio and internet radio, which further extend the capabilities and reach of radio broadcasting.

As a medium, radio has been influential in shaping public opinion, culture, and entertainment since its inception in the early 20th century, remaining a significant means of communication even in the digital age.