Question

what is lens formula derive an expression for the lens formula in case of convex lens when real image is formed​

Answer 1

lens formula is

1/f=1/v-1/u
when object is placed on 2f2 then real image is form

Answer 2

Answer:

1/f=1/v-1/u

Explanation:

when the object is placed at 2f from the left of the lens, the desired character is obtained