An equiconvex lens is cut into two halves along (i)
and (ii)
as shown in the figure. Let
be the focal lengths of the complete lens, of each half incase (i), and of each half in case (ii), respectively. Choose the correct statement from the following 
Text Solution
Verified by ExpertsA
: Since the lens is equiconvex, the radius of curvature of each half is same, say R . We know from Lens maker ’ s formula

(considering the lens to be placed in air).
Here 

by c onvention
(i)
If we cut the lens along
then the two halves of the lens will be having the same radii of curvature and so, focal length 
But when we cut it along YOY ’ then, we will have
but 


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