In a classroom model, a row of marks represents successive wave crests in light from galaxy R. A student moves the marks farther apart to represent an increase in the wavelength of the light reaching an observer.
Give the name for this increase in wavelength.
State what this tells you about the movement of galaxy R.
79 exam-style questions on AQA GCSE Physics 8.2 Red-shift, covering 8.2 Red-shift. Each one has a worked solution and a mark scheme showing where the marks go.