One plano-convex and one plano-concave lens of same radius of curvature 
but of different materials are joined side by side as shown in the figure. If the refractive index of the material of 
is 
and that of 
is 
then the focal length of the combination is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
JEE Main 2019
Focal length of plano-convex lens-
Focal length of plano-concave lens -
For the combination of two lens-
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