background correction
What background correction means in Physics GCSE, as defined for AQA.
Definitions of background correction
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain background correction in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
If a background count rate is quoted anywhere in the question, subtract it from every value before you start.
Measuring the count rate with no source present and subtracting that background from every reading.
Topics that use background correction
- Background radiation (AQA GCSE)
- Half-lives and the random nature of radioactive decay (AQA GCSE)
Related terms
- constant chance of decay
- dose versus activity
- fraction not number
- net decline as a ratio
- occupational dose
- random decay
- risk to tissue
- steepest curve
Using background correction in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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