Home
Class 12
PHYSICS
Greatest thickness of a plano convex gla...

Greatest thickness of a plano convex glass lens appear to be 2 cm when observed normally through the plane surface and when observed through the curved face, the greatest thickness is `20//9` cm. If the real thickness be 3 cm, what is the refractive index of the lens ?

A

`20//9`

B

2

C

1.5

D

1.3

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

Greatest thickness of a plano convex glass lens appear to be 2 cm when observed normally through the plane surface and when observed through the curved face, the greatest thickness is 20//9 cm. If the real thickness be 3 cm, what is the radius of curvature of the spherical surface ?

A plano convex lens (n = 1.5) and radius of curvature 20 cm is silvered at the curved surface. What is the power of the system ?

If in a plano-convex lens radius of curvature of convex surface is 10 cm and the focal length of the lens is 30 cm, the refractive index of the material of the lens will be :

A Plano-convex lens of radius of curvature 0.1m is kept over a plane glass plate with curved surface of the lens touching it. The gap between the glass plate and the curved surface of the lens is filled with a liquid. If the combined focal length of the combination is 0.4m, calculate the refractive index of the material of the liquid. Given R.I. of the material of the lens is 1.5.

The radii of curvatur of the faces of a double convex lens are 10cm and 15 cm. If focal length of the lens is 12 cm, find the refractive index of the material of the lens.

An air bubble in a glass slab (n = 1.5) is 5 cm deep when viewed from one face and 2 cm deep when viewed from the opposite face. The thickness of the slab is

A planoconvex lens behaves like a concave mirror of 30 cm focal length on silvering the plane surface of the lens, but on polishing by silver on convex surface, it acts as is concave mirror of 10 cm focal length. What will be the refractive index of the material of the lens ?

An air bubble inside a glass slab (mu= 1.5) appears at 6 cm when viewed from one side and 4 cm when viewed from the opposite side. The thickness of the slab is