Hey guys I'm new here and I'm lookin' for some help as I'm sure a lot of you come here for that reason as well. I did an experiment where I fill a 150 mL half full, place a pencil in the middle and move it sideways until it reaches the side of the beaker. Then I am to draw a ray diagram of what I saw. I know the pen refracts but I have no idea how to put that into a ray diagram. Could someone provide an example for me so I can get a better understanding? Sorry if this is in the wrong section, and thanks!