TOPIC: RADIATION PROTECTIONπ IMPORTANT POINTS TO REMEMBERπΉNatural radiation: It yields an average annual dose of about 0.79 mSv. It has three components: cosmic radiation, terrestrial radiation and internal sources.πΉCosmic radiation: It includes both energetic subatomic particles and photons of extraterrestrial origin that reachΒ the earth.
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