A factory uses a beta source to monitor the thickness of paper. The source and detector remain in fixed positions. The paper becomes thicker. What happens to the radiation?
More is absorbed and the count rate decreases.
More is absorbed and the count rate increases.
Less is absorbed and the count rate decreases.
Less is absorbed and the count rate increases.
97 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity, covering 6.5.1 Uses of radioactivity, 6.5.2 Dangers of ionising radiation and precautions, 6.5.3 Half-life and radiation dangers, 6.5.4 Safety precautions for radiation exposure, and 6.5.5 Contamination and irradiation. Each one has a worked solution and a mark scheme showing where the marks go.