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background radiation
radiation around us all the time
2 naturals sources of background radiation
radioactive rocks which are found on the ground eg granite
cosmic rays, which are very high energy particles which travel through space and crash into earth’s atmosphere
2 man made sources of background radiation
-fallout from nuclear weapons testing- nuclear weapons testing has released radioactive isotopes into environment for decades
-nuclear accidents-radioactive isotopes are released by accidents at nuclear power stations
what affects your exposure to background radiation
-location
-occupation
how is dose of radiation measured in
sieverts (Sv)
1 milisievert (mSv) equal to how many sieverts(Sv)
1/1000 of sievert