An astronomer compares the same spectral pattern in the light from galaxies M and N with the pattern measured in a laboratory. The red-shift of the light from galaxy M is greater than the red-shift of the light from galaxy N.
What can the astronomer conclude about the two galaxies?
Galaxy M emits redder light than galaxy N
Galaxy M is moving towards the Earth
Galaxy M is closer to the Earth than galaxy N
Galaxy M has a greater recession speed than galaxy N
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.