Background Radiation
In certain locations, radon gas can seep up from the ground into buildings. Other sources of background radiation in the UK are shown in the diagram.

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Key terms in this lesson
- gamma radiation
- Ionising electromagnetic radiation emitted from the nucleus of an unstable atom, usually following alpha or beta emission.
More in Radioactivity
- The nature of α, β and γ Radiation.
- Gamma radiation
- Radioactive Change
- The Dangers of Radioactivity
- Radioactive Decay and Half-life
- Activity
- Radioactive Decay
- Decay Constant
All 25 lessons in Radioactivity · All OCR A-level Physics topics