Home
Class 12
PHYSICS
An equiconvex lens is cut into two halve...

An equiconvex lens is cut into two halves along `(i) XOX^(')` and `(ii) YOY^(')` as shown in the figure. Let `f,f^(')f^('')` be the focal lengths of the complete lens, of each half in case `(i)`, and of each half in case `(ii)`, respectively
Choose the correct statement from the following

A

`f'=f,f''=f`

B

`f=2f,f''=2f`

C

`f'=f,f''=2f`

D

`f'=2f,f''=f`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

The focal length of a converting lens are f_(v) and f_(r) for violet and red lights, respectively. Which of the following is correct?

The figure shows and equiconvex lens of focal length f. It the lens is cut along PQ, the focal length of each half will be

An equiconvex lens of focal length 15 cm is cut into two equal halves in thickness. What is the focal length of each half ?

If a equiconvex lens of focal length f is cut into two halves by a plane perpendicular to the principal axis, then

An equiconvex lens of focal length20 cm is cut into two equal halves perpendicular to the principal axis and kept at a separation of 10 cm co-axially. What ils the focal length of the each part is?

In the arrangement shown in figure, pulley is smooth and massless and all the strings are light. Let F_(1) be the force exerted on the pulley in case (i) and F_(2) the force in case (ii). Then :

The equiconvex lens has focal length f. If is cut perpendicular to the principal axis passin through optical centre, then focal length of each half is

Calculate equivalent focal length of plano convex lens for following case:- (i) When curved surface is silvered. (ii) When plane surface is silvered.

Three containers of same base area, same height are filled with three different liquids of same mass as shown in the figure. If F_(1),F_(2),F_(3) are the force exerted by the liquid on the base of the container in case I, and II respectively, then we have the relation:

An equi-convex lens of focal length F in air is is cut into two halves along the plane perpendicular to the optic axis. One of the halves is placed between a fixed object and a screen separated by distance of 90 cm . Two images are formed on the screen for two different positions of the lens with magnification 2 and 1/2 respectively. Find the value of F . what would be the value of the focal length of the equiconvex lens if the lens is immersed in water ? Refractive index of the material of the lens is 1.5 and that of water is mu_w=4//3 .