Hi, I'm a senior graduating this spring and I'm doing horrible in my gen ed class- my last attempt to not fail the class (I have a very low D and a 3.7 gpa so you see why I'm nervous), is extra credit. we did not have an assigned book for this class and she's given very little information other than notes- which do not correspond with our EC assignments. the question asks: light from the air passes through plates of glass and plastic below. the speed of light in the different materials are shown to the right. Construct a rough sketch showing an appropriate path through the system of four plates. compared to the 50 degree incident ray at the top, what can you say about the angles of the ray in the air between and below the block pairs? i scanned and image that can be seen at this link: http://www.wright.edu/~gildenmeister.2/scan.jpg i'm not asking anyone to do this for me, but what I need to do to solve it, I want to learn how to do it, I just don't have a clue how to go about the actual solving process. Thank you.