Question

the size of the real image formed by a convex lens is same with the object. The focal length of the Lens is?

Answer 1

Hi/ho =1 = -v/u

-v=u

By mirror formula

1/f=1/v+1/u

1/f= 1/v -1/v ...........(since,-v=u)

So,1/f=0

F=0