Q

An object is at the principal focus of a concave lens. Which image is formed?

RRB Group-D 18/08/2022 / Shift-I 2022
✓ Answer: B Virtual and highly diminished
The source selects B. For u = -F and f = -F, v = -F/2 and m = +1/2, so the image is virtual, erect and half-sized rather than point-like.
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