BLUE SKY IN A CUP
There are many demonstrations on how and why the sky is blue. But this one might be the simplest. In this video, Anna Spitz shows how to create a blue sky effect with just a glass of water and a drop of milk. It is called Rayleigh Scattering.
The AAPT Films Video: Blue Sky in a Cup - Starring Anna Spitz. Written and Directed by James Lincoln.
Of course, Anna Spitz has already hosted a video about the blue sky in this video from Arbor Scientific:
Check out more videos like these at PhysicsVideos.com
