Background radiation is around us all of the time.
It comes from:
natural sources such as rocks, radon gas and cosmic rays from space
man-made sources such as the fallout from nuclear weapons testing and nuclear accidents.
The level of background radiation and radiation dose may be affected by occupation and/or location.
Radiation dose is measured in sieverts (Sv)
1000 millisieverts (mSv) = 1 sievert (Sv)
You will not need to recall the unit of radiation dose - but it is useful general knowledge! |