Which device can produce a real, inverted image under proper conditions?

Which device can produce a real, inverted image under proper conditions?

• A. Concave lens
• B. Plane mirror
• C. Convex mirror
• D. Convex lens

Answer: (D)

Real images are formed when light rays actually converge to a point on the other side of the lens, so the image can be projected onto a screen. A convex lens is a converging lens, and when an object is farther from the lens than its focal length, the rays meet on the opposite side, producing a real, inverted image. The other options don’t do this: a concave lens tends to produce virtual, upright images; a plane mirror and a convex mirror produce virtual images that are upright. So the convex lens is the device that can create a real, inverted image under the right conditions.

Real images are formed when light rays actually converge to a point on the other side of the lens, so the image can be projected onto a screen. A convex lens is a converging lens, and when an object is farther from the lens than its focal length, the rays meet on the opposite side, producing a real, inverted image. The other options don’t do this: a concave lens tends to produce virtual, upright images; a plane mirror and a convex mirror produce virtual images that are upright. So the convex lens is the device that can create a real, inverted image under the right conditions.