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Welcome to the eGyanKosh resource page for Unit-12 on Radioactivity, designed for IGNOU students in 2025. Here, you will find comprehensive study materials that delve into the fundamental concepts of radioactivity, including its principles, applications, and implications in various fields. Our aim is to provide you with easy access to high-quality resources that facilitate your learning journey. Whether you’re preparing for exams or seeking to deepen your understanding of this fascinating subject, our free downloadable materials are tailored to support your academic success. Explore the content below to enhance your studies and make the most of your educational experience with IGNOU.