n equi biconvex lens p 1 5 of focal length 20 cm is cut into

Last updated: 6/12/2023

n equi biconvex lens p 1 5 of focal length 20 cm is cut into two parts and placed in contact as shown in the figure A liquid of refractive index 1 3 s filled between the two parts of lens Then find the equivalent focal length of the combination in cm