AP EAPCET 24-Aug-2021 Shift 2 Paper

Given that, focal length of convex lens =f
Distance of object from 1st focus point =x
Now, object distance, u=−(f+x)
We know that, ratio of size of real image to that of
object = magnification which is given by
m=

v

u

=

f

f+u

⇒m=

f

f−(f+x)

=−

f

x

Taking magnitude only, |m|=

f

x