| Describe carefully any two of the following Cepheid-calibrated extragalactic distance indicators. Your account should explain the basis of the technique and how it is used to measure distance. Mention any particular advantages or disadvantages. | |
| (i) The Fundamental Plane; | [5] |
| (ii) Type II supernovae; | [5] |
| (iii) Gravitational Lens time delays. | [5] |
(2005 Q5(b) [slightly modified].)