Spec 0625
Revise CIE IGCSE Physics 5.2.1 Background radiation and measuring count rate with the question bank, lessons, revision guides, and flashcards.
Know what is meant by background radiation • Know the sources that make a significant contribution to background radiation including: (a) radon gas (in the air) (b) rocks and buildings (c) food and drink (d) cosmic rays • Know that ionising nuclear radiation can be measured using a detector connected to a counter • Use count rate measured in counts/s or counts/minute • Supplement: Use measurements of background radiation to determine a corrected count rate
