A hot-water pipe passes through an unheated roof space. A curved metal screen is fitted close to the pipe, with its polished surface facing the pipe.
Explain why fitting the polished metal screen decreases the net rate of energy transfer from the pipe by infrared radiation.
106 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.