A doctor treats a tumour deep inside a patient's body by directing gamma radiation at it from outside the body.
Which property of gamma radiation allows it to reach the tumour?
It is moderately ionising and moderately penetrating.
It is the most strongly ionising type.
It is by far the most penetrating type.
It is the only ionising type.
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.