This is a true of false question from my homework: Three light rays start out from a candle flame at the same time. To the right of the candle there is a lens, and to the right of the lens there is a screen. Ray A goes through the edge of the lens. Ray B goes through the center of the lens. Ray C goes through an intermediate part of the lens. All three rays are focussed on the screen. Ray B arrives at the screen first because it travels the shortest path. I am wondering, does it matter if the len is converged or diverged? And I don't get how Ray A would travel after passing the edge of the len. From what I have read from the book, i only know how the ray exactly travel if it is traveling, parallel to the axis, through the center of len, and the focus. So where would Ray A go after passing through the len?