Notes on Pages 24 29

Today when I read Chapter 5 section three I was astounded with all the new thing i learned for example; When an object or wave hits a surface through which it cannot pass, it bounces back. I already new this before but I was unsure of my tests. I also learned that When a wave moves from one medium into another medium at an angle, it changes speed as it enters the second medium, which causes it to bend, This was one of the most interesting things i figured out. I found this Section very interesting fun and interactive.