Question

A divergent lens has a focal lenght of 20cm at what distance should an object of height 4cm from the optical centre of the lensbe placed so that its image is formed 10cm away from the lens find the size of the image

Answer 1

the focal length =-20
the image distance (v)=-10
the object distance (u)=?
1/v-1/u=1/f
1/-10-1/u=1/-20
u+10/-10u=-1/20
u+10=10u/20=u/2
2u+20=u
u=-20
since linear magnification=v/u
-10/-20=1/2
also
size of image /size of object=1/2
hence
size of the image =1/2*4=2cm

plzz mark me as brainliest

Answer 2

I think it helps you to solve your question