Question

An object is held at 40 cm from a concave lens of focal length 60 cm.The distance of the image from the lens is 2 points -40 cm - 60 cm 24 cm - 24 cm

Answer 1

Hola mate here is your answer!

Given:

u=(-40)cm

f=(-60) cm

To find:

v=?

Solution:

Using mirror formula

$\frac{1}{f} + \frac{1}{u} = \frac{1}{v}$

$\frac{1}{ - 60} - \frac{1}{40} = \frac{1}{v}$

$\frac{1}{v} = \frac{1}{ - 24}$

$v = - 24cm$

Hope it helps!