At the end of a long race, a runner is wrapped in a blanket made from a thin plastic sheet with a shiny metal coating.
Explain how the shiny coating reduces the energy transferred away from the runner by radiation.
Suggest why the blanket would work less well if the coating were matt black.
40 exam-style questions on AQA GCSE Physics 6.3 Black body radiation, covering 6.3.1 Emission and absorption of infrared radiation and 6.3.2 Perfect black bodies and radiation. Each one has a worked solution and a mark scheme showing where the marks go.