JAMB UTMEPhysicsOptics2021

A convex lens forms what image of a distant object?

AReal invertedCORRECT
BVirtual erect
CReal erect
DVirtual inverted
AI
Toasta AI Explanation
Why the answer is A, and why the others tempt you.
**The reasoning** When parallel rays from a distant object (like the sun or a faraway tree) enter a convex lens, they converge and meet at the **focal point** on the opposite side of the lens. This creates an actual image you can project onto a screen — that's what makes it **real**. Since light rays cross over after passing through the lens, the top of the object ends up at the bottom of the image and vice versa — making it **inverted** (upside down). Think of how a camera or your eye works: both use convex lenses and form real, inverted images of distant scenes. **Why the wrong options tempt you** **B & D (Virtual)** — Virtual images can't be projected on a screen; they occur when rays appear to diverge (like in a mirror). Convex lenses form virtual images only for objects placed *very close* (within the focal length), not distant ones. **C (Real erect)** — This contradicts the ray diagram. Real images from convex lenses are *always* inverted because of how light bends and crosses. **Quick takeaway** Convex lens + distant object = real inverted image at the focal point — just like what happens inside every camera!
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