Cambridge IGCSE Physics
5.2.4Half-life
Half-life in Cambridge IGCSE Physics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic27 practice questions2 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 5.2.4.1Define half-life and use it in simple calculations, including data in tables and decay curves.
- 5.2.4.2Supplement: find half-life from data or decay curves where background radiation has not been subtracted.
- 5.2.4.3Supplement: explain how the type of radiation and the half-life decide which isotope suits smoke alarms, food irradiation, sterilisation, thickness measurement and tracers.
Lessons
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Half-life
30 min
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Uses of radioactivity and radiation safety
30 min
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Sample question
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Turn Half-life into a strength.
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