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GCSE Combined Science · key term
Ionising radiation present around us in the environment, even when no deliberate radioactive source is nearby.
Used by Edexcel
Paper 5, Paper 6
Revise: Radiation properties, background and detectionA radiation detector can register radiation even when no radioactive source has been placed beside it. This is because background radiation is present around us in the environment. It has both natural and human-made origins.
When comparing detector readings, keep the source–detector distance the same and account for background radiation.
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