https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BzFUvVu_WNI_YmUzMDUxY2UtZThjYi00MjFkLWEwODItMWFjZjM0NzRjY2I0&hl=en
This is the link to the slideshow we used for the radiation lesson on Friday.  As I said in class, we had to move quickly to cover everything so make sure that you go back and have a better look at  the questions on the last slide.