An astronomer replaces an eyepiece with a detector that records a long exposure. Which pair of advantages explains why this can improve observations?
It changes radio waves to light and provides a permanent record.
It gathers light over time and removes absorption by the atmosphere.
It changes radio waves to light and removes absorption by the atmosphere.
It gathers light over time and provides a permanent record.
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.