A virtual, erect and 2 times magnified image of an object is to be produced with a concave mirror of focal length 12cm. Calculate the position of the object.

Dear Student ,
Here in this case from the given data if we apply the equation of spherical mirror we get ,
1v+1u=1f-12u+1u=-112 vu=212u=-112u=6 cmSo the object is at 6 cm from the concave mirror .

Regards

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