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For a convex lens to form a real, inverted image that is larger than the object, where must the object be placed?
ABetween F and 2F
BBeyond 2F
CBetween F and the optical centre
DAt 2F
Answer & Solution
Correct answer: A. Between F and 2F
1. A convex lens gives a magnified real image only when the object lies between F and 2F (C).
2. The image then forms beyond 2F, real and inverted.
3. Placing the object beyond 2F gives a diminished image, and at 2F gives same size.
4. Inside F the image is virtual and erect, so that option is ruled out.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 2 Optics "Refraction through a Convex Lens", p.28_
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