In: Physics
A diverging lens of focal length 15 cm forms an image of object placed at 30 cm from the lens.
The magnification of the lens is:
we have,
focal length of diverging ( Concave ) lens 
distance of object from the lens
As per the thin lens equation the relation between 
, 
 and the distnace  
  of
the image from the lens will be given as,

Using 
 and 
 in above relation we get,





sign indicates that the image is formed on the same side as that
the object,
So, the magnification  
of diverging lense will be given as,

using  
and  
we get the magnification of lense as,

