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If a Magnification Of, –1 is to Be Obtained by Using a Converging Lens of Focal Length 12 Cm, Then the Object Must Be Placed: (A) Within 12 Cm (B) at 24 Cm (C) at 6 Cm (D) Beyond 24 Cm - Science

If a magnification of, –1 is to be obtained by using a converging lens of focal length 12 cm, then the object must be placed:
(a) within 12 cm
(b) at 24 cm
(c) at 6 cm
(d) beyond 24 cm

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Solution

At 24 cm
For an object placed at a distance of 2F from a convex lens, the size of the image so formed is equal to the size of the object.

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APPEARS IN

Lakhmir Singh Class 10 Physics (Science)
Chapter 5 Refraction of Light
Q 39 | Page 248
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