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Learning objective

Determine the half-life using data or decay graphs that do not account for background radiation.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE PhysicsNuclear physicsSupplement content

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Quick explanation

Determine the half-life using data or decay graphs that do not account for background radiation

  • This point belongs to Half-life, especially Half-life outcomes.
  • You need to be able to determine the half-life using data or decay graphs that do not account for background radiation.
  • The key ideas to know are Calculate and Determine.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

CalculateDetermine

Why it matters

This objective helps connect Half-life outcomes to exam-style questions, flashcards, and revision notes for Half-life.

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Practice Questions7 linked questions

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Paper 4 structured question: Half-life

Paper 4Theory (Extended)3 marks

Description

Decay of a Radioactive Isotope

After 10 years, the amount of isotope remaining is measured.

  1. a

    Calculate the amount of the isotope remaining after 30 years.

    Aim for approximately 3 distinct marking points.

    [3]
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