An object is placed 2f from the pole of a curved mirror of focal length f.

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The magnitude of linear magnification is 1 for both types of curved mirror.

The magnitude of linear magnification is 1 for a convex mirror.

The nature of image will be real for concave mirror.

The magnitude of linear magnification is 1 for a concave mirror.

answer is B, D.

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Detailed Solution

For a concave mirror, when object is placed at 2f
$\Rightarrow m_{concave} = \frac{- f}{- f - (- 2 f)} = - 1, So a real image formed is inverted and of same size .$
For convex mirror
$\Rightarrow m_{convex} = \frac{f}{f - (- 2 f)} = \frac{1}{3} . So a virtual image formed, is erect and diminished .$

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