Make sure that you can answer these questions
- Give examples of natural sources of background radiation.
- Give examples of man-made sources of background radiation.
- What can the level of background radiation depend on?
- What can radiation dose depend on?
- What is the radiation dose measured in?
- How many Sieverts is 1000 millisieverts (mSv) equivalent to?
These questions can be answered by looking at page 42 of the GCSE Physics Specification.
An extract is given here