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Describe how you could demonstrate that the source emits $\beta$-particles only. In your answer, you may refer to Fig. 12.1 and include any other apparatus you think is needed.
Physics 0625 · IGCSE · Radioactivity
Radioactivity — practice question
Fig. 12.1 illustrates a radioactive source positioned near a radiation detector and counter. The detector is able to detect $\alpha$, $\beta$ and $\gamma$ radiation. The radioactive source emits only $\beta$-particles.