Final answer:
True, an image with vignetting will feature dim edges as a result of reduced light passing through the periphery of the lens. This effect is enhanced when the aperture is reduced and can be influenced by the properties of the lens, whether converging or diverging.
Step-by-step explanation:
The statement is true; an image that displays vignetting will indeed be dim around the periphery. Vignetting occurs when the edges of an image are significantly darker than the center. When a lens is "stopped down" or the aperture is reduced with an iris diaphragm—a device that covers its periphery—the amount of light passing through the edges of the lens decreases, which can lead to vignetting. This phenomenon can also be influenced by the properties of the lens, as converging lenses (thicker near the center) or diverging lenses (thicker near the edges) manipulate how light passes through them and can contribute to the vignetting effect.It is important to understand that light rays coming from all parts of an object can pass through every part of the lens to form the final image—meaning that even when the periphery of a lens is obstructed, light passing through the unobstructed portions can still contribute to image formation, although the image may appear fainter.