Deepak uses a magnifying lens to enlarge newspaper print
Deepak uses a magnifying lens to enlarge newspaper print. Then he points the same lens at his sister standing far away, and she appears small and upside down. Deepak says the lens has gone bad. Farah says the lens is fine and only the distance has changed. Who is right?
Who do you think is right? Pick one.
The answer: Farah is right
Why
Deepak's surprise makes sense — we even call the thing a magnifying glass, so shrinking feels like a fault. But the name describes one way of using it, not a promise the lens makes. A convex lens simply bends light inward to a meeting point, and what you see depends entirely on whether the object sits closer than that meeting point or beyond it. Hold it close to newsprint and you get a large upright image; move well past that distance and the rays cross before reaching you, so the image arrives small and inverted. Test: keep the lens still and walk it slowly away from a letter on the page — you can watch the letter swell, blur at the changeover, then flip. Farah is right: the lens never changed, only where the object stood.
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