Telescopes detect different types of electromagnetic radiation from stars.
The Table shows the approximate percentage of each type of radiation from space that reaches the Earth's surface.
Table
| Type of radiation | Percentage reaching the Earth's surface |
|---|---|
| radio waves | 95 |
| infrared | 20 |
| visible light | 80 |
| ultraviolet | 5 |
| X-rays | 0 |
Use the Table to give the two types of radiation that are best observed with telescopes on the ground.
Explain why telescopes that detect X-rays are placed outside the Earth's atmosphere.
Give two disadvantages of placing a telescope in space.
Some infrared telescopes are built at the top of high mountains.
Suggest why.
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.