Interactive practical

Inverse-square law for gamma radiation

Measure background and gamma counts at fixed source-detector distances, then test corrected count rate against inverse-square distance.

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Practice: Inverse-square law for gamma radiation

WJEC 1420QS — this practical matches your selected course; the questions check the method, data handling and practical skills.

Check your answers as you work. For written questions, use the marking points to assess your response.

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2 of 2 available questions match the selected filters. This session contains 2 questions.

Question 1 · 1 mark · Foundation · Practical · Diagnostic

Which graph gives a straight line if C ∝ \(\dfrac{1}{(d + e)^{2}}\)?

Question 2 · 3 marks · Standard · Practical · Practical method

Inverse-square law for gamma radiation

Practice: Inverse-square law for gamma radiation

Which graph gives a straight line if C ∝ \(\dfrac{1}{(d + e)^{2}}\)?

Explain why the background count rate is measured and subtracted.