A converging lens has a focal length of 0.12 m . To get an image of unit magnification the object should be placed at what distance from the converging lens?

Question

A converging lens has a focal length of 0.12 m . To get an image of unit magnification the object should be placed at what distance from the converging lens? (A)  0.24 m  (B)  0.12 m  (C)  0.06 m  (D)  0.4 m

Tardigrade Admin · Accepted Answer

Given: f=+0.12 m (converging lens), m=-1 To get a unit magnification from a converging lens , i.e., convex lens, the object must be placed at 2F u=-2× 0.12 m =-0.24 m

Q. A converging lens has a focal length of $0.12 m$ . To get an image of unit magnification the object should be placed at what distance from the converging lens?

$0.24 m$

$0.12 m$

$0.06 m$

$0.4 m$

Given: $f = + 0.12 m$ (converging lens),
$m = - 1$
To get a unit magnification from a converging lens , i.e., convex lens, the object must be placed at $2 F$
$u = - 2 \times 0.12 m$
$= - 0.24 m$

Q. A converging lens has a focal length of 0.12m . To get an image of unit magnification the object should be placed at what distance from the converging lens?

0.24m

0.12m

0.06m

0.4m