Astronomers use space telescopes to analyze light from distant galaxies to understand the evolution of the Universe.
One of the key pieces of evidence supporting the Big Bang theory is the red-shift of light observed from these galaxies.
Describe what is meant by the term red-shift of light.
53 exam-style questions on Edexcel GCSE Physics 7.2 The Universe and red-shift, covering 7.2.1 Big Bang and Steady State theories, 7.2.2 Evidence for the Big Bang, 7.2.3 The Doppler effect and red-shift, 7.2.4 Red-shift as evidence for an expanding Universe, and 7.2.5 The CMB and the accepted model. Each one has a worked solution and a mark scheme showing where the marks go.