Two optical telescopes have identical mirrors and detectors. One is on the ground and one is in space. On a clear night, the space telescope produces a sharper image. Which explanation is correct?
It avoids moving air that changes the direction of incoming light.
It avoids gravity that changes the colour of incoming light.
It is much closer to the star and receives a much larger image.
It receives light travelling much faster than light at ground level.
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.