CBSE Class 10 Answered
Radiation
Asked by baidshryans | 17 Dec, 2008, 11:27: AM
Expert Answer
Primary contributions of background radiations come from:
- Sources in the earh. These include sources in food and water, which are incorporated in the body, and in building materials and other products that incorporate those radioactive sources;
- Sources from space, in the form of cosmic rays;
- Sources in the atmosphere. One significant contribution comes from the radon gas that is released from the Earth's crust and subsequently decays into radioactive atoms that become attached to airborne dust and particulates. Another contribution arises from the radioactive atoms produced in the bombardment of atoms in the upper atmosphere by high-energy cosmic rays.
Answered by | 17 Dec, 2008, 02:24: PM
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