"This is how we discover that one colour is indeed several colours, due to the effect of waves. Once the wavelengths are changed, the colour changes accordingly. We also discover that colour is not a part of the essence of the item's material and that the colour of the item is only a translation of the nature of the waves. These waves cause the atoms on the external surface to vibrate, reflecting them and allowing us to see them. As for waves that do not affect the atoms, they are absorbed, rendering them invisible to us.
It is a fun ride between waves and colours. It is an entertaining and useful booklet, just as all the other booklets of the series. The booklet is characterized - like the others - by simplicity and avoidance of stiff and complicated terminologies, commonly used in scientific language. "