Why are laboratory workers who handle gamma-emitting radioactive sources required to wear protective aprons lined with lead?
Lead absorbs the highly penetrating gamma radiation, reducing the dose received by the worker.
Lead increases the half-life of the radioactive source, making it decay slower.
Lead decreases the half-life of the radioactive source, making it decay faster.
Lead repels the gamma radiation, deflecting it away from the worker.
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.