A thin biconvex lens is prepared from the glass ( 
) both curved surfaces of which have equal radii of 20 cm each. Left side surface of the lens is silvered from outside to make it reflect. To have the position of image and object at the same place, the object should be placed, from the lens at a distance of 
cm.
Text Solution
Verified by ExpertsA
Combination of lens + mirror
To form image at the position of object, it should be placed at center of curvature of mirror + lens combination.
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