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Radioactive Decay · Paper 1 — Free Physics HL Practice Questions

1FoundationMCQTypes of radiation: Alpha, beta, gamma1 markPaper 1~2 min
A Geiger-Müller tube connected to a counter is used to investigate three radioactive sources. Source X is completely stopped by a sheet of paper. Source Y penetrates 3 mm of aluminium but is stopped by 10 cm of lead. Source Z is deflected toward the negative plate when passed between two oppositely charged parallel plates. Which row correctly identifies the nature of the radiation from Source Y?

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