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Where do you place the object in front of a convex lens to get a real and equal size image of an object?
(a) At the principal focus of the lens,
(b) At twice the focal length
(c) At infinity
(d) Between the optical centre of the lens and the principal focus
(b) At twice the focal length
Explanation: The image is formed at infinity when the object is placed (b) at twice the focal length of the convex lens. The image formed will be real, inverted, and of same size.
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