A scientist wants to absorb all the beta (β\betaβ) particles emitted by a radioactive source, while allowing most of the gamma (γ\gammaγ) radiation also emitted by the source to pass through.
Which of the following is the most suitable shield to place in front of the source?
A sheet of paper
A 5 mm thick plate of aluminium
A 5 cm thick block of lead
A thin layer of plastic wrap
134 exam-style questions on CIE IGCSE Physics 5.2.2a Alpha, beta and gamma emission. Each one has a worked solution and a mark scheme showing where the marks go.