If a body is placed at 20cm in front of a convex lens of focal length 20cm.
find the position of image and nature?
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Explanation:
At twice the focal length, the image formed by the convex lens is real and of the same size as the object. If the lens has a focal length of 20 cm, the object must be positioned 40 cm in front of the lens, creating an inverted image of the same size as the target, 40 cm behind the lens.
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