A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. Iflenses are made of different materials of refractive indices 
and 
and 
is the radius of curvature ofthe curved surface ofthe lenses, then the focal length of the combination is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
: The combination oftwo lenses 1 and 2 is as shown in figure.
According to lens maker ’ s formula 
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