Question

Match the following: Four combination of two thin lenses are given in Column I. The radius of curvature of all curved surfaces is r and refractive index of all the lenses is 1.5. Match lens combination in Column I with their focal length in Column II.
Column I
(P) Please refer the image
(Q) Please refer the image
(R) Please refer the image
(S) Please refer the image

Column II
(1) 2r
(2) r/2
(3) -r
(4) r.

Answer 1

Here is the answer for you dear

Answer 2

Answer:

P_2

Q_4

R_3

S_1

Explanation:

Conceptual