Radioactivity is a phenomenon of spontaneous emission of proton (a-particles), electrons (ß-particles) and ?-rays (short wave electromagnetic waves) due to disintegration of atomic nuclei of some elements. These cause radioactive pollution. Radiations are of two types ionising and non-ionising. Non-ionising radiations affect only those components which absorb them and have low penetrability. Ionising radiations have high penetration power and cause breakage of macro molecules.
Man-made sources of radiation pollution are mining and refining of plutonium and thorium, production and explosion and nuclear weapons, nuclear power plants and fuels and preparation of radioactive isotopes.
There are commonly three types of radiation, namely:
Man-made sources of radiation pollution are mining and refining of plutonium and thorium, production and explosion and nuclear weapons, nuclear power plants and fuels and preparation of radioactive isotopes.
There are commonly three types of radiation, namely:
Alpha particles, can be blocked by a piece of paper and human skin.
· Beta particles can penetrate through skin, while can be blocked by some pieces of glass and metal.
· Gamma rays can penetrate easily to human skin and damage cells on its way through, reaching far, and can only be blocked by a very thick, strong, massive piece of concrete.
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