Large number of thin strips of black paint are made on the surface of a convex lens of focal length 20 cm to catch the image of a white horse. The image will be

When black paint strips are applied to a convex lens, every unblocked portion of the lens still focuses light rays from all parts of the object to form a complete, undistorted image of the white horse. However, because the effective aperture is reduced, less light enters the lens, resulting in a horse of less brightness.