Question

an object 2 cm tall is kept on the principal axis of a converging lens of focal length 8 cm find the position nature and size of image formed if the object is 12 cm from the lens also find the magnification produced by the lens​

Answer 1

u=-12

f=-8

mirror formula

1/f=1/v+1/u

1/v=1/f-1/u

1/v=1/-8-1/-12

1/v=-3+2/24

v=-24

object size 2

m=-v/u=hi/ho

m=-(-24) /-12 x 2 = hi

hi=-4 cm

M=-4/2

m=-2