A research team estimates the distances from the Earth to three receding galaxies.
| Galaxy | Distance from the Earth in million light-years |
|---|---|
| D | 800 |
| E | 200 |
| F | 500 |
The same spectral line is present in the light from each galaxy.
What can be concluded about the order of the observed wavelengths of the line, from largest to smallest?
Galaxy D, then galaxy E, then galaxy F
Galaxy D, then galaxy F, then galaxy E
Galaxy E, then galaxy F, then galaxy D
Galaxy F, then galaxy D, then galaxy E
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.