Edexcel IGCSE Physics · Spec 7.12-7.13
Half-Life Calculations
Covers distinguish activity from detector count rate, Correct measurements for background radiation and Solve repeated-halving and graph problems.
Physics revision video
Half-Life Calculations
Prefer to watch on YouTube? Open this video on YouTube.
Spec 7.12-7.13
What you need to know
- Distinguish activity from detector count rate
- Correct measurements for background radiation
- Solve repeated-halving and graph problems
Active recall
Quick check
Answer each question before opening the answer.
What does one becquerel mean?
One nuclear decay per second
How is corrected count rate calculated?
Measured count rate minus background count rate
What fraction remains after three half-lives?
One eighth
Physics video companion
Keep your notes and exam practice together
The free Physics workbook follows every video in specification order.