A convex lens has focal length of 12cm. At which of the following positions should an object be placed so that this convex lens may act as magnifying glass?
(a) 26 cm (b) 17 cm
(c) 9 cm (d) 24 cm
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(c) 9 cm
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Answer:
(b) 17cm
Explanation:
In convex lens, when object is placed between 2F and F, we get enlarged/magnified image.
F = 12cm, 2F = 24cm
So, the correct answer is (b)17cm
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