Physics A-Level
Exponential decay of activity
What Exponential decay of activity means in Physics A-Level, as defined for OCR.
Definition of Exponential decay of activity
Check what you remember
Read the wording for your board, then hide it and explain Exponential decay of activity in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The equation A = A₀e^(−λt) relates activity at time t to initial activity, decay constant and elapsed time.
Topics that use Exponential decay of activity
- Radioactivity (OCR A-Level)
Related terms
- Absorber
- Alpha decay
- Beta-minus decay
- Beta-plus decay
- Carbon-14 and half-life
- Corrected count rate
- Decay constant
- Experimental measurement of half-life
Using Exponential decay of activity in the exam
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