In certain areas of the UK with granite bedrock, such as Cornwall, the average annual background radiation dose is 7.8 mSv7.8\text{ mSv}7.8 mSv. By contrast, the average annual background radiation dose for the rest of the UK is 2.3 mSv2.3\text{ mSv}2.3 mSv.
Cosmic radiation is a form of background radiation that increases with altitude. A passenger on a single one-way flight from London to Los Angeles receives an additional cosmic radiation dose of 0.055 mSv0.055\text{ mSv}0.055 mSv.
Calculate the number of these one-way flights a passenger would need to take to be exposed to a radiation dose equivalent to the excess annual background radiation received by a resident in Cornwall compared to the rest of the UK.
Practise AQA GCSE Physics Hazards and uses of radioactive emissions and of background radiation (physics only) with exam-style questions for Foundation and Higher tier. 16 questions covering Background radiation, Different half-lives of radioactive isotopes, and Uses of nuclear radiation, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.