The distance of an object from the principal focus of a concave mirror of focal length F is D. The ratio of the size of image to the size of object is a) F/D b) (F/D)2 c) (F/D)1/2 d) F+D/F-D

Dear Student ,
Here in this case the object distance , u = D and the focal length is f = F .
Now let us take that the image distance is v .
So applying the equation of spherical mirror we get ,

Regards

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