Light from galaxy A shows a greater red-shift than light from galaxy B.
Which statement is correct?
A is moving away faster than B and is probably further away
A is moving away more slowly than B and is probably closer
A is moving towards the Earth faster than B and is probably closer
A is moving away faster than B but is probably closer to the Earth
50 exam-style questions on OCR GCSE Physics 8.3 Beyond Earth, covering 8.3.1 Red-shift and the expanding universe, 8.3.2 Evidence for the Big Bang model, 8.3.3 Formation of the Sun and stellar equilibrium, 8.3.4 Radiation emitted by hot bodies, 8.3.5 The solar system and satellites, 8.3.6 Gravity and circular orbits, 8.3.7 Orbital radius and orbital speed, 8.3.8 Radiation balance and the temperature of the Earth, and 8.3.9 Seismic waves and exploring hidden structures. Each one has a worked solution and a mark scheme showing where the marks go.