A manufacturer is choosing one of two coatings for metal panels inside an industrial kiln. The panels transfer energy to the material in the kiln by infrared radiation.
Identical test panels with coatings P and Q received the same infrared radiation for 10 seconds.
| Coating | Energy absorbed in 10 seconds in J |
|---|---|
| P | 360 |
| Q | 140 |
During use, the coated panels will be at the same temperature and the same distance from the material. All other conditions will be the same.
Explain which coating should be used to heat the material in the shortest time.
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.