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EESA10H3 (506)
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Department
Environmental Science
Course
EESA10H3
Professor
N/ A
Semester
Summer

Description
Radiation and Human Health Lecture 6 We can not escape radiation 1.Background radiation-Natural radioactivity in the Earth and by cosmic rays from outer space Can not be controlled 2.Manmade radiation -electronic products: •X-ray machines •X ray diagnostic •Television sets •Microwave ovens •Radar devices •Lasers •Can be controlled Radiation and Human Health Ionized radiation Non-ionized radiation How does Ionized Radiation cause health effects? www.notesolution.com Radioactive material that decay spontaneously produce ionizing radiation Strip away electrons from atoms (create two charged ions) Break some chemical bonds Alpha, beta particles, gamma and x-rays (differ in the amount of energy they have) Health effects from exposure to radionuclides 1. Stochastic health effects -Chronic •Long term, low level of exposure •Increase levels of exposure make these effects more likely to occur but do not influence the type or severity of the effect
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