Home
Class 12
PHYSICS
The focal length of a biconvex glass (mu...

The focal length of a biconvex glass `(mu_g = 1.5)` lens in air `(mu_alpha = 1) is + 20 cm`. Then the focal length of this glass lens in water `(mu_omega = 1.33)` is

A

20

B

-20

C

Zero

D

Infinity

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

The focal length of a bi-convex glass (mu_g = 1.5) in air is 20 cm. Find its focal lengths in water (mu_w = 1.35) and in carbon di-suphide (mu_(cs) = 1.65).

focal length double convex glass (u_g = 1.5) lens of radii of curvatures 20 cm each immersed in air is (u_a = 1)

Focal length of a double convex glass (u_g = 1.5) lens of radii of curvatures 20 cm each immersed in water, (mu_w = 1.35)

The focal length of a spherical lens is 50 cm. The power of the lens in Dioptre is

A len's power is +2.5 DE . calculate the focal length of lens and its nature.

The radii of curvatures of both surfaces of a double convex lens made of glass, (mu = 1.5) is R. Its focal length is

A lens behaves as a converging lens in air (mu_alpha = 1) and diverging lens inwater (u_omega = 1.33) . The refractive index mu of the material of the lens is