Alpha, beta and gamma radiation Quiz
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5 questions, one answer each
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1. Which radiation is stopped by a thin sheet of paper?
- A. Gamma
- B. Beta-minus
- C. Alpha
- D. All three
2. A gamma source gives a corrected count rate of 160 min⁻¹ at 0.40 m. What is the corrected rate at 0.80 m?
- A. 80 min⁻¹
- B. 40 min⁻¹
- C. 320 min⁻¹
- D. 20 min⁻¹
3. What is the best way to eliminate background radiation from a count rate calculation?
- A. Use a stronger source
- B. Measure it with no source and subtract it
- C. Use only gamma radiation
- D. Move the source further away
4. Which of these is the largest natural source of background radiation in the UK?
- A. Cosmic rays
- B. Food and drink
- C. Radon gas
- D. Nuclear fallout
5. Which graph gives a straight line through the origin to verify the inverse-square law?
- A. Count rate against distance
- B. Count rate against 1/distance
- C. Count rate against distance squared
- D. Count rate against 1/distance squared