A spectral line that has a wavelength of 434 nm in a laboratory is observed in the light from three galaxies. Its wavelength is 441 nm in the light from galaxy E, 452 nm in the light from galaxy F and 447 nm in the light from galaxy G.
Which galaxy is moving away from the Earth at the greatest speed?
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.