A dental surgery uses an X-ray machine to produce images of teeth. A replacement detector produces a usable image when fewer X-rays reach it than the previous detector needed.
Which settings should the dentist use with the replacement detector?
Increase the beam intensity and keep the exposure time at its original setting.
Keep the beam intensity and exposure time at their original settings.
Reduce the beam intensity and keep the exposure time at its original setting.
Reduce the beam intensity but lengthen the exposure to deliver the original dose.
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.