A lens of focal length is placed between an object and a screen at a distance

PHYSICS · Multi correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

A lens of focal length

f

is placed between an object and a screen at a distance

d

. The lens forms two real images of the object on the screen at two different positions separated by a distance

x

. The two real images have magnifications

m_1

and

m_2

, respectively, where

m_1>m_2

. Choose the correct statement(s). (1)

m_1m_2=-1

(2)

m_1m_2=1

(3)

f=\frac{d^2-x^2}{4d}

(4)

d\geq4f