An illuminated object is positioned at a distance \(d_o > 2f\) from a thin converging lens of focal length \(f\), forming a sharp, inverted real image on a screen placed at distance \(d_i\). An opaque card is then placed directly against the lens, completely blocking its upper half while leaving the lower half exposed. Which of the following best explains the appearance of the image on the screen after the card is introduced?