A beta gauge measures the count rate after radiation has passed through a moving sheet of clear packaging film. The count rate is higher than expected. Which combination of film thickness and beta absorption explains this reading?
The film is too thin, so more beta particles are absorbed.
The film is too thick, so more beta particles are absorbed.
The film is too thin, so fewer beta particles are absorbed.
The film is too thick, so fewer beta particles are absorbed.
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.