An object is seen through a flat piece of glass of index of refraction 1.5 and thickness 6 cm. If the object is a distance 10 cm away form the near-surface of the glass, what is the location of the image seen by the observer directly at the other side of the glass?
I'm having trouble figuring out where the rays of light converge. By my count, any ray that goes from the arrow straight through the glass will simply re-emerge at the same angle. Since by geometry the second angle of incidence will be the same as the first angle of refraction. Therefore, if I draw two rays going straight from the top of the object to the bottom, I will simply get two parallel rays that never converge.
What rays do I draw to correctly find the location of the image? My understanding is that I should generally use a parallel line and one through the focal point, but in this case there is no focal point.