Question

(24) The effective focal length of the lens combination
shown in 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
the lens is 1.5 The refractive index of the liquid is
1) 1.33
2) 1.42
3) 1.53
4) 1.60
I​

Answer 1

Answer:

1.53

Explanation:

1/f=1/v-1/I

1/1.5=1/v+1/60

v=1.53