Home
Class 11
PHYSICS
The focal lengths of a lens are in the r...

The focal lengths of a lens are in the ratio 8:3 when it is immersed in two different liquids of refractive induces 1.6 and 1.2 respectively. The refractive index of the material of the lens is

A

`1.25`

B

`1.5`

C

`1.8`

D

2

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

Consider an equiconvex lens of radius of curvature R and focal length f. If fgtR , the refractive index mu of the material of the lens

Focal length of a convex lens of refractive index 1.5 is 2 cm. Focal length of lens when immersed in a liquid of refractive index 1.25 will be

The focal length of lens of refractive index 1.5 in air is 30 cm When it is immersed in water of refractive index (4)/(3) ,then its focal length will be

A thin convex lens made from crown glass (mu = 3//2) has focal length f . When it is measured in two different liquids having refractive indiced 4//3 and 5//3 , it has the focal length f_(1) and f_(2) respectively. The correct ralation between the focal lengths is

A plano-convex lens is made of refractive index of 1.6. The focal length of the lens is

For a plano convex lens, the radius of curvature of convex surface is 10 cm and the focal length is 30 cm. The refractive index of the material of the lens is

The radius of curvature of the curved surface of a plano-convex lens is 20 cm . If the refractive index of the material of the lens be 1.5 , it will

The effective focal length of the lens combination shown in figure is -60 cm. The radius 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. The refractive index of the liquid is

A double convex lens of focal length 30 cm is made of glass. When it is immersed in a liquid of refractive index 1.4, the focal length is found to be 126 cm. The critical angle between glass and the liquid is

Find the radius of curvature of the convex surface of a plan-convex lens, whose focal length is 0.3 m and the refractive index of the material of the lens is 1.5.