VIRTUAL IMAGE - EVALUATION OF DATA Q18. Sketch a ray diagram to show how the principal rays (parallel to the optical axis and through the center of the lens) from the top of the "4" diverge as they are refracted by the convex lens placed at the 19 cm mark. Our eye interprets these diverging rays as appearing to originate from some point behind the lens. Using dashed lines, trace the diverging rays back until they converge behind the lens, then sketch the virtual image that is formed