Physics....

Today I am going to talk to you about a video I saw yesterday that was at least 1 hour long. It was actually a lecture given by Walter who is the professor of Physics in MIT. He was mainly talking about the mixture of colours and the rainbow in the sky. He also answered some questions like " Why is the sky blue?" or " What is the radius of a rainbow?" If you would like to find out the answers to those questions and many other difficult ones you could go to www.mitworld.com and go to the topic of physics and you'll see the video.