Our topic is about rainbows. They are made from a light source and a separating agent, e.g., a prism and water droplets. They are made of 7 colours, red blue green yellow indigo purple and orange. As you may not know light contains many colours, although they do not look like they contain any, they actually hold many different colour that are invisible to the naked eye, you need a separating agent to take out the different colours in a light source. Rainbows are some of the most interesting things of the world.
![](https://i.ytimg.com/vi/PGhmBWsTqMA/mqdefault.jpg)