An object located posterior to the center of rotation is most likely to produce what?

• A. Real image
• B. Ghost image
• C. Double image
• D. No image

Answer: (C)

When a system has a defined center of rotation, the position of an object relative to that center determines how light is redirected to form an image. If the object sits behind the center of rotation, the light can reach the imaging plane along two distinct angular paths. Those two paths can converge at two separate points, producing two distinct image locations of the same object. In other words, the geometry creates a pair of conjugate images, so you observe a double image.

This differs from a real image, which is a single focused image on a screen, or a ghost image, which is typically a faint secondary image from reflections within surfaces rather than from having two converging paths. No image would occur if the rays fail to converge at all.