An observatory compares a spectral line from three galaxies with its laboratory frequency of 6.00 × 1014 Hz.
| Galaxy | Observed frequency in Hz |
|---|---|
| S | 5.91 × 1014 |
| T | 5.82 × 1014 |
| U | 5.94 × 1014 |
Using the general relationship between red-shift and distance, which sequence starts with the furthest galaxy and ends with the nearest galaxy?
T, U, S
T, S, U
S, T, U
U, S, T
94 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.