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A convex lens produces a virtual, erect and magnified image of a real object. In which region must the object be located relative to the lens?
ABetween the focus F1 and optical centre O
BExactly at twice the focal length 2F1
CBeyond 2F1 from the lens
DAt infinity from the lens
Answer & Solution
Correct answer: A. Between the focus F1 and optical centre O
1. A convex lens gives a virtual erect image only when the object is inside the focus.
2. From the table, an object between F1 and O forms a virtual, erect and enlarged image on the same side.
3. Positions at or beyond 2F1 give real inverted images, so they are incorrect.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 7 "Lenses", p.92_
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