Asked by Salim

How far should and object be from a concave sperical mirror of radius 36cm to form a real image one-ninth it's size?
Answered by drwls
Let the object distance be Do. The image distance must be Di = Do/9 to achieve the desired magnification.

The focal length of the mirror is
f = R/2 = 18 cm

Solve the basic equation
1/Do + 1/Di = 1/f

It isn't hard.
Answered by LJ
180
Answered by Ankita
90
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