A horticulture laboratory uses an infrared detector to monitor radiation from two heated incubation chambers, A and B. The chambers are at the same temperature and the same distance from the detector, but their outer surfaces have different finishes. Because of these finishes, the readings for chamber A and chamber B, after correcting for background, are expected to be in the ratio 5:35:35:3.
The background reading is measured three times.
| Measurement | Detector reading in units |
|---|---|
| background reading 1 | 5 |
| background reading 2 | 6 |
| background reading 3 | 7 |
| chamber A | 46 |
Calculate the detector reading expected for chamber B, including the background.
96 exam-style questions on Edexcel GCSE Physics 5.3 Black body radiation, covering 5.3.1 Emission of radiation and temperature, 5.3.2 Radiation balance and constant temperature, and 5.3.3 The temperature of the Earth. Each one has a worked solution and a mark scheme showing where the marks go.