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RP12: Inverse Square Law for Gamma Radiation

Investigation of the inverse square law for gamma radiation using a Geiger-Müller tube

Required PracticalAQAA-Level

🔬 Equipment Required

  • Sealed gamma source (e.g., Co-60 or Cs-137)
  • Geiger-Müller tube and counter/ratemeter
  • Metre ruler
  • Clamp stands
  • Stopwatch
  • Lead absorbers (for shielding)
  • Tongs for handling source

🦺 Safety Precautions

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

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About RP12: Inverse Square Law for Gamma Radiation

RP12: Inverse Square Law for Gamma Radiation is a required practical for AQA A-Level Physics. This practical investigation of the inverse square law for gamma radiation using a geiger-müller 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 AQA A-Level Physics exams and can be worth significant marks. Practice with our AI-generated questions to master this practical.

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