A radioactive source is placed near a radiation detector. The radiation arriving at the detector from the source is measured for 10 minutes with different materials placed between the source and the detector.
| Material between source and detector | Radiation detected / counts |
|---|---|
| none | 8420 |
| sheet of paper | 3150 |
| thick sheet of aluminium | 3120 |
| thick sheet of lead | 180 |
Which types of radiation are emitted by the source?
α\alphaα-particles and β\betaβ-particles
α\alphaα-particles and γ\gammaγ-rays
β\betaβ-particles and γ\gammaγ-rays
β\betaβ-particles only
134 exam-style questions on CIE IGCSE Physics 5.2.2a Alpha, beta and gamma emission. Each one has a worked solution and a mark scheme showing where the marks go.