Visible light, radio waves, X-rays, gamma rays and microwaves are some of the components of the electromagnetic spectrum.

1. (a)State two other components of the electromagnetic spectrum. 1. 2.[1]
2. (b)White light is a mixture of different colours. Fig. 5.1 shows a ray of white light entering a glass prism. The white light separates into a number of colours. Only the blue light and the red light are shown. Explain why the blue light and the red light separate as shown. Use the term refractive index in your answer. [Figure 5.1][3]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.