alleryA magnifying glass works best when the object is at:
AAt infinity in standard practice
BAt 2F in standard practice
CDistance just less than the focal length
DAt the optical centre
Answer & Solution
Correct answer: C. Distance just less than the focal length
1. A magnifying glass should give a virtual, erect, magnified image at the near point.
2. This needs the object inside the focal length.
3. Closer to F gives a sharp, large virtual image.
4. So the object goes just inside the focal length.
_Source: Selina Concise Physics ICSE Class 10, Ch 5 'Refraction through a Lens' (aplustopper.com extract)_
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