Question

a convex lens has a focal length of 25 CM calculate the distance of the object from the lens if the image is to be formed on the opposite side of the lens at a distance of 70 cm from the lens what will be the nature of the image ​

Answer 1

1/v-1/u=1/f

here f =25cm

v=70cm

1/70+1/25=1/u

=>(25+70)u=70x25

=>95u=1750

=>u=18.421053cm

I think this will help you