An engineer is choosing a material for a heated target used to test an infrared detector. The table shows what happens when radiation is incident on each material.
| Material | Behaviour of incident radiation |
|---|---|
| W | All is absorbed; none is reflected or transmitted |
| X | All is reflected; none is absorbed or transmitted |
| Y | All is transmitted; none is absorbed or reflected |
| Z | Equal amounts are absorbed and reflected; none is transmitted |
Which material would be the best possible emitter of infrared radiation when heated?
material W, which absorbs all incident radiation
material Y, which transmits all incident radiation
material Z, which absorbs and reflects equal amounts
material X, which reflects all incident 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.