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Radiation

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Radiation
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We can classify radiation into ionizing and non-ionizing radiation, according to the effects it produces on matter.
Ionizing radiation includes cosmic rays, X rays and the radiation from radioactive materials.
Non-ionizing radiation includes ultraviolet light, radiant heat, radio waves and microwaves.In medical practice ultrasound and magnetic resonance imaging (MRI) involve non-ionizing radiation.

+light n heat radiation produced by the sun
*ionizing radiation is produced by some minerals in the earth
*our bodies contain radioactive material
*dose rate increases with altitude and latitude
*natural rays- cosmic rays,gamma raysfrom the Earth, radon decay products in the air, and various radionuclides found naturally in food and drink.
*X rays, fallout from the testing of nuclear weapons in the atmosphere, discharges of radioactive waste from the nuclear industry, industrial gamma rays, and miscellaneous items such as consumer products
*COMMON USES OF RADIATION IN INDUSTRY — Radiography of welds and joints. Security inspection of bags and parcels. Level gauging of container contents.
*environmental radiation- nuclear weapon tests, radioactive discharges,depleted uranium,
*contaminated areas
*Laptops,CordlessPhones,refrigerators,
Wireless Routers(Wi-Fi) ,Cell Phones ,

The likelihood of such effects depends on the amount of radiation that a person receives, whether from a natural or an artificial source. As the effects of ionizing radiation have become better understood during recent decades, a system of radiological protection has been developed to protect people from exposure to sources of radiation.

3) The unit used to measure radiation dosage is the rem, which stands for roentgen equivalent in man. It represents the amount of radiation needed to produce a particular amount of damage to living tissue.

Although a dose of just 25 rems causes some detectable changes in blood, doses to near 100 rems usually have no immediate

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