A plate is tested in an evacuated chamber. It exchanges energy with its surroundings only by radiation. For each test, measurements are taken after the plate's temperature has stopped changing.
| Plate temperature | Energy absorbed | Time |
|---|---|---|
| 300 K | 3.6 kJ | 60 s |
| 360 K | 7.5 kJ | 60 s |
Calculate the increase in the plate's average emitted power between the two tests, and explain how its peak wavelength changes.
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.