Daniel Díez, from 6ºA, has a real prism. If you want to use it, you can ask him. It can be used in a dark room with a sunlight coming inside. If you use it, take a picture and send it to me, I'll post here in the blog.
Fill a glass with water and put it next to a window in a sunny day. Then put a white paper in front of the glass and you'll apreciate the rainbow colours, those are the mixture of white light.
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