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PAG 5: Inverse Square Law (Radiation)

Investigate the inverse square law for gamma radiation using a GM tube

Required PracticalOCRA-Level

πŸ”¬ Equipment Required

  • Sealed gamma source
  • Geiger-MΓΌller tube and counter
  • Metre ruler
  • Clamp stands
  • Stopwatch
  • Lead shielding
  • Tongs for source handling

🦺 Safety Precautions

  • Follow CLEAPSS guidelines
  • Minimise exposure time
  • Maximise distance from source
  • Use shielding when not measuring
  • Handle source with tongs only
  • Never point source at people
  • Return to secure storage after use

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About PAG 5: Inverse Square Law (Radiation)

PAG 5: Inverse Square Law (Radiation) is a required practical for OCR A-Level Physics. This practical investigate the inverse square law for gamma radiation using a gm tube

Students are expected to understand the method, identify and control variables, use appropriate equipment, analyse results, draw graphs, identify sources of error, suggest improvements, and consider safety precautions.

Questions on required practicals frequently appear in OCR A-Level Physics exams and can be worth significant marks. Practice with our AI-generated questions to master this practical.

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