In civil engineering, a density gauge containing a gamma-emitting radioactive source is used to inspect concrete foundation piles for internal structural defects. If a void or pocket of air is present within the pile, a higher intensity of radiation is transmitted through to the sensor on the opposite side.
Identify one type of device that could be employed as the sensor to detect and measure this ionising radiation.
81 exam-style questions on Edexcel GCSE Physics 6.1 Atomic structure and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.