A technician needs to handle a radioactive source that emits γ\gammaγ-rays.
Which of the following actions will not reduce the amount of radiation that reaches the technician?
Keeping the source inside a sealed vacuum chamber
Minimizing the time spent near the source
Placing a thick lead shield between the technician and the source
Maximizing the distance between the technician and the source
42 exam-style questions on CIE IGCSE Physics 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.