Home
Class 12
PHYSICS
A convexo-concave lens has faces of radi...

A convexo-concave lens has faces of radii 3 and 4 cm respectively, and is made of glass of refractive index 1.6, its focal length is

A

40 cm

B

`-40 cm`

C

20 cm

D

`-20 cm`.

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A convex lens made up of glass of refractive index 1.5 is dipped, in turn, in (i) a medium of refractive in dex 1.65, (ii) a medium of refractive index 1.33. (a) Will it behave as a converging or a diverging lens in the two cases ? (b) How will its focal length change in the two media ?

A thin prism P_1 with angle 4^@ and made from glass of refractive index 1.54 is combined with another prism P_2 made from glass of refractive index 1.72 to produce dispersion without deviation. What is the angle of the prism P_2 ?

A lens made from a material of absolute refractive index n_1 is placed in a medium of absolute refractive index n_2 . The focal length f of the lens is related to n_1 and n_2 as :

A thin prism P_(1) with angle 4^(@) and made from a glass of refractive index 1.54 is comined with another thin prism P_(2) made from glass of refractive index 1.72 to produce dispersion without deviation. The angle of the prism P_(2) is