JEE Advanced 2014 Paper 2

Section: Physics
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Question : 19 of 60
 
Marks: +1, -0
Four combinations of two thin lenses are given in List 1. The radius of curvature of all curved surfaces is r and the refractive index of all the lenses is 1.5. Match lens combinations in List I with their focal length in List II and select the correct answer using the code given below the lists.
List I     List II
P.
    1. 2r
Q.
    2. r/2
R.
    3 -r
S.
     4. r
[JEE Adv 2014 P2]
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