Home
Class 12
PHYSICS
The first factor length f(1) for refract...

The first factor length `f_(1)` for refraction at a spherical surface is defined as the value of u corresponding to `v=oo` (as shown) with refractive indices of two mediums, as `n_(1)` and `n_(2)`. The second focal length `f_(2)` is defined as value of v for `u=oo`.

A

`f_(2)` is equal to `(n_(2)R)/((n_(2)-n_(1))`

B

`f_(1)` is equal to `(n_(2)R)/((n_(2)-n_(1))`

C

`f_(2)` is equal to (-) `(n_(2)R)/((n_(2)-n_(1))`

D

`f_(1)` is equal to (-) `(n_(2)R)/((n_(2)-n_(1))`

Text Solution

Verified by Experts

The correct Answer is:
A, D
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    CENGAGE PHYSICS|Exercise DPP 1.4|15 Videos

  • RAY OPTICS

    CENGAGE PHYSICS|Exercise DPP 1.5|15 Videos

  • RAY OPTICS

    CENGAGE PHYSICS|Exercise DPP 1.2|15 Videos

  • PHOTOELECTRIC EFFECT

    CENGAGE PHYSICS|Exercise Integer Type|4 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    CENGAGE PHYSICS|Exercise QUESTION BANK|40 Videos

Similar Questions

Explore conceptually related problems

The two spherical surfaces of a double concave lens have the same radius of curvature R, and the refractive index of the medium enclosed by the refracting surfaces is mu then the focal length of the lens is

A lens made of material of Refractive index mu_(2) is surrounded by a medium of Refractive Index mu_(1) . The focal length f is related as

If u_(1) and u_(2) are the selected in two system of measurement and n_(1) and n_(2) their nomerical values, then

Two refracting media are separated by a spherical interfaces as shown in the figure. AB is the principal axis, mu_1 and mu_2 are the refractive indices of medium of incidence and medium of refraction respectively. Then,

A biconvex lens made of material with refractive index n_(2) . The radii of curvatures of its left surface and right surface are R_(1) and R_(2) . The media on its left and right have refreactive indices n_(1) and n_(3) respectively. The first and second focal lengths of the lens are respectively f_(1) and f_(2) . The ratio, f_(1)//f_(2) , of the two focal lengths is equal to

If f_(1) and f_(2) represent the first and second focal lengths of a single spherical refracting surface, then

A sequence is defined by the recurrence relation u(n+1)=-3u(n)+7 with u(0)=2 What is the value of u(2)?