EESA10H3 Lecture Notes - Lecture 6: Microwave Oven, Acute Radiation Syndrome, Electromagnetic Field
23 Apr 2013
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Document Summary
Background radiation natural radioactivity in the earth and by cosmic rays from outer space: cant be controlled. Manmade radiation electronic products: x-ray machines, x-ray diagnostic, tv"s, microwaves, radar devices, lasers, can be controlled. Radioactive material tha decay spontaneously produce ionizing radiation: strip away electrons from atoms (create 2 charged ions, break some chemical bonds. Alpha, beta particles, gamma and x-rays (differ the amount of the energy they have) Increase levels of exposure make these effects more likely to occur but do not inglucence the type of severity of the effect: cancer uncontrolled growth of cells. Damage at the cellular or molecular level: changes in dna mutations. Teratogenic (fetus most sensitive in 8-15 week of pregnancy, smaller head or brain size, poorly formed eyes, mental retardation) Increase levels of exposure make these effects more severe: cancerous health effects, radiation sickness nausea, weakness, hair loss, skin burn or diminishing organ function, premature aging, death.
