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Textbook Compulsory (3-5) Chapter 3 Sections 3 and 4 "Application, Hazard and Protection of Radioactivity" ppt 1. Understand the application and hazards of radioactivity, and know how to protect against radioactivity. 2. Understand the binding energy of atomic nuclei and understand Einstein's mass-energy equation. 3. Can use the energy equation to calculate the binding energy according to the mass loss. 1. Application of radioactivity Use the characteristics of rays (1) Use α rays to ionize the air around the radiation source, or use α rays to eliminate static electricity accumulated due to friction. (2) Use β-ray to measure the thickness and density of thin objects. (3) Use γ-ray for nondestructive testing, or use γ-ray for breeding, killing pests, keeping food fresh, and killing cancer cells.
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