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Edexcel IGCSE Physics 7.5 Alpha Beta and Gamma Radiation Questions

Practise alpha, beta and gamma questions by comparing charge, penetration, ionisation and evidence from absorbers or cloud chambers.

Syllabus
First assessment 2019
Course
Physics 4PH1

Exam points

  • Use cloud-chamber tracks to infer alpha radiation's short range and strong ionisation.
  • Compare alpha, beta and gamma by charge, mass, penetration and ionising ability.
  • Explain shielding or count-rate results using absorber material and radiation type.

Edexcel IGCSE Physics 7.5 Alpha Beta and Gamma Radiation Questions question 1

[Maximum number: 1]

This question is about radioactive isotopes used for medical imaging.

When iodine-131 decays, it emits beta radiation and gamma radiation.

A patient swallows a tablet containing iodine-131. The radiation emitted can be detected outside the body.

Give a reason why gamma radiation is more likely to be detected outside the body than beta radiation.

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