A technician measured the emission spectrum of an electric heating element at each of four operating settings. The peak wavelengths and corresponding surface temperatures are recorded below.
| Setting | Surface temperature in ∘C^\circ\text{C}∘C | Peak wavelength in μm\mu\text{m}μm |
|---|---|---|
| 1 | 327 | 4.8 |
| 2 | 527 | 3.6 |
| 3 | 727 | 2.9 |
| 4 | 1027 | 2.2 |
What do these measurements show about a setting with a shorter peak wavelength?
It has the same surface temperature.
It has a higher surface temperature.
Its surface temperature varies independently of peak wavelength.
It has a lower surface temperature.
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.