Why are telescopes that detect X-rays from stars placed outside the Earth's atmosphere?
The atmosphere changes X-rays into radio waves.
The atmosphere absorbs X-rays before they reach the ground.
The atmosphere makes X-rays travel away from Earth.
The atmosphere increases the wavelength of all X-rays.
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.