A geologist is using a portable Geiger-Muller counter to assess the radioactivity of a shale formation. Before taking readings from the rock face, they must establish an accurate baseline for the local background radiation count rate.
Explain the procedure the geologist should follow to obtain an accurate value for this background radiation count rate.
90 exam-style questions on Edexcel GCSE Physics 6.3 Nuclear equations and decay. Each one has a worked solution and a mark scheme showing where the marks go.