Radioactivity Tamil revision mind map comparing alpha beta and gamma radiation side by side by penetrating power, deflection, and stopping material: alpha as helium nuclei stopped by paper, beta as fast electrons stopped by a few millimetres of aluminium, gamma as high-energy electromagnetic radiation stopped only by thick lead, plus a first-order exponential decay curve explaining half-life as the constant time for a radioactive sample to halve regardless of starting amount.
↔️ முழுப் படத்தையும் காண பக்கவாட்டில் நகர்த்துக (scroll to see full poster)