Question 18
HThe Figure shows two images of the same group of stars. One image was taken with a large telescope on the ground. The other image was taken with a smaller telescope in space.
Figure
The Table gives some information about the two telescopes.
Table
| Telescope | Mirror diameter in m\text{m}m | Cost to build and launch in £ million | Expected working life in years |
|---|---|---|---|
| ground | 8.0 | 200 | 50 |
| space | 2.4 | 1500 | 25 |
a.[2]
Use the Figure to give two differences between the images.
b.[2]
Explain why the image from the telescope on the ground is blurred.
c.[3]
Calculate the cost for each year of working life of each telescope.
Use your answers to compare the costs of the two telescopes.
d.[2]
The telescope on the ground has a much larger mirror.
Suggest why astronomers still choose to build telescopes in space.
7.3 Stars Questions
75 exam-style questions on Edexcel GCSE Physics 7.3 Stars, covering 7.3.1 Evolution of stars similar to the Sun, 7.3.2 Evolution of massive stars, and 7.3.3 Observing the Universe. Each one has a worked solution and a mark scheme showing where the marks go.