EESA10H3 Lecture Notes - Lecture 6: Ionizing Radiation, Microwave Oven, Tumor Suppressor Gene
28 Feb 2016
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We can not escape from radiation (a) sorted by where its comes from: background radiation: natural radioactivity in the earth and by cosmic rays from outer space which can not be controlled. Radiation that reaches the earth from outer space. Some rocks give off radioactive radiation radon gas. It"s hard to be controlled, but it can be controlled. Nuclear missiles: nuclear bombs have been exploded by humans, releasing radiation into the environment. Nuclear power: nuclear power stations have released radiation into the environment. Q1: look at the following pie chart and try to figure the data: From the chart, we can find that most of the radiation around us comes from nature radiation ( the most portion of it is radon gas form the ground ), and around 12. 5% of them are from artificial sources. The most portion of artificial radiation comes from medical machines. Rain washing radioactive materials out of the air.
