1Can you project the light passing through the prism onto a wall or a screen? What do you see as the prism is rotated?
2When Newton's disc is spun fast, will the colours of the rainbow combine and disappear to form a white colour?
3What is dispersion of light?
4Why does dispersion of light take place?
5In the prism experiment, why is red seen at the top of the screen and violet at the bottom?
6What is the visible spectrum, and how are its colours remembered?
7A light wave has a wavelength of \( 6.0 \times 10^{-7} \) m. Which colour is it? Give a reason.
8What is Newton's disc, and what does it show?
9How can two identical prisms be used to recombine the seven colours into white light?
10Explain how a rainbow is formed.
11Why does a rainbow look like a semicircle from the ground but a full circle from an aeroplane?