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Welcome to the eGyanKosh platform, your comprehensive resource for educational materials. In this unit, we delve into the technical aspects of radio, a pivotal medium of communication that has evolved significantly over the years. Designed specifically for IGNOU students in 2025, this study material offers a detailed exploration of radio technology, its functioning, and its impact on society. With easy access to valuable insights and information, students can download the material for free, enhancing their understanding and fostering a deeper appreciation for the role of radio in modern communication. Join us as we navigate the intricacies of radio technology and its relevance in today’s world.