A galaxy is moving away from the Earth. Light from the galaxy is red-shifted.
How are the wavelength and the frequency of the light observed on Earth different from light given out by a source that is not moving?
The wavelength is longer and the frequency is lower
The wavelength is longer and the frequency is higher
The wavelength is shorter and the frequency is higher
The wavelength is shorter and the frequency is lower
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.