An object is placed at a distance of f 2 from a convex lens of focal length f . The image will be

Question

An object is placed at a distance of f 2 from a convex lens of focal length f . The image will be, At one of the foci, virtual and double its size, Is greater than 1.5 but less than 2.0, At 2 f , virtual and erect, None of the above

MARKS App · Accepted Answer

1 v - 1 - f / 2 = 1 f 1 v = 1 f - 2 f = - 1 f or v = - f Again, m = v u = - f - f / 2 = 2 Clearly, the image is virtual and double the size

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