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natural sources of radiation (3)
- cosmic rays
- radon gas
- rocks
man-made sources of radiation
- fallout from nuclear weapons
- fallout from nuclear testing
- nuclear accidents
Most ionising radiation
alpha
most penetrating radiation
gamma
how is nuclear radiation used in medicine (2)
- exploration of internal organs
- control or destruction of unwanted tissue
sterilising
gamma rays can kill any microbes/bacteria on medical equipment