During manufacture, a refractory brick is held first at 800 K and then at 1000 K. At each temperature, a sensor records the energy emitted by the brick as electromagnetic radiation during three separate time intervals of equal length.
| Temperature in K | Length of each interval in s | Energy emitted in each interval in kJ |
|---|---|---|
| 800 | 40 | 4.9, 5.0, 5.1 |
| 1000 | 20 | 5.8, 6.0, 6.2 |
A technician claims that raising the temperature of the brick from 800 K to 1000 K more than doubles the power it emits.
Use calculations from the data to determine whether the technician is correct.
Describe how the peak of the wavelength distribution of the radiation emitted by the brick at 800 K differs from the peak at 1000 K. Refer to both the position and the height of the peak.
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.