A catalogue lists three receding galaxies in order of distance from the Earth, starting with the nearest: R, S, then T.
An astronomer plans to measure the wavelength of a hydrogen spectral line in the light from each galaxy. She will use 656 nm, the value for this line found in a laboratory, as her reference. Four students each predict the three wavelengths she will record, listed in the order R, S, T.
| Prediction | Wavelengths in nm |
|---|---|
| 1 | 661, 667, 675 |
| 2 | 676, 668, 662 |
| 3 | 667, 667, 667 |
| 4 | 640, 646, 652 |
Which prediction agrees with the catalogue?
Prediction 2
Prediction 4
Prediction 3
Prediction 1
79 exam-style questions on AQA GCSE Physics 8.2 Red-shift, covering 8.2 Red-shift. Each one has a worked solution and a mark scheme showing where the marks go.