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0 of 6 objectives have lessons · 0 studied · 0 secure
Lessons for this topic haven’t been written yet. The objectives below show exactly what the syllabus expects, so you can plan with them in the meantime.
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Understand that fluctuations in count rate are evidence that radioactive decay is random.
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Understand that radioactive decay is both spontaneous and random.
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Define activity and decay constant, and recall and use A = λN.
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Define half-life.
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Use λ = 0.693 / t½.
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Understand that radioactive decay is exponential, and sketch and use x = x₀e^(−λt), where x may be the activity, the number of undecayed nuclei or the received count rate.
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