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प्रश्न
A magnifying lens has a focal length of 100 mm. An object whose size is 16 mm is placed at some distance from the lens so that an image is formed at a distance of 25 cm in front of the lens.
Where should the object be placed if the image is to form at infinity?
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उत्तर
The object should be placed at the focus for the image to be formed at infinity.
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