Astronomers compare a spectral feature in light from galaxies with its wavelength measured in a laboratory. The survey results below show the mean increase in wavelength for galaxies in different distance bands.
| Distance band from Earth in millions of light years | Mean increase in wavelength in nm |
|---|---|
| 0–200 | 1.2 |
| 200–800 | 5.0 |
| 800–1600 | 12.0 |
Describe the relationship shown by the survey results and what they indicate about the motion of the galaxies.
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.