The effective focal length of the lens combination shown in the figure is -60 cm. The radii of curvature of the curved surfaces of the plano-convex lenses are 12 cm each and refractive index of the material of the lens is 1.5. What would be the refractive index of the liquid?
Text Solution
Verified by ExpertsThe correct answer is:
D
By lens maker's formula
Also, 
or 
; or 
or 
or 
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