A radioactive source emitting β\betaβ-particles is used for a demonstration in a physics laboratory.
Which safety precaution must be taken by the teacher carrying out the experiment to minimize radiation exposure?
Handle the source with long-handled tongs.
Wear safety goggles.
Place the source on a heat-proof mat.
Always point the source towards the class.
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.