← all questions · Physics · 9702 · Paper 4
Positron emission tomography (PET scanning) makes use of a tracer containing a radioactive material that decays by positron emission.
State what is meant by a tracer.
9702/04/SP/22Cambridge International AS & A Level Physics 9702 · Specimen 2022 · Paper 4 · Question 11(a)(i)
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Suggested time: 3 min