Colour Mixing
This video from the Royal Institution describes how colour mixing works. Colours of light cannot be mixed in physics but different cones in your eyes are sensitive to different colours. The brain interprets a mixture between the two as a colour somewhere between the two. In the case of magenta, your brain invents this colour…
Cloud Chamber
This video from the Royal Institution shows tracks within a cloud chamber. A supersaturated layer of alcohol vapour exists just above the floor of the chamber and the ionisation radiation causes vapour to condense along the path of the radiation. An Americium source is introduced into the chamber so that tracks from alpha radiation…