Physics · Oct / Nov 2022 · Paper 11 · Question 40

Radioactive isotopes that emit alpha-particles, beta-particles and gamma rays are stored in wooden boxes that are lined with a material that prevents most radiation escaping from the box. [diagram showing a wooden box with lid lining, box lining and radioactive isotope] Which material is used for the lining?

1. Acopper
2. Bglass
3. Clead
4. Dplastic

As printed in the paper