Question

at which position will you keep an object in front of a convex lens so as to get a real image of the same size as the object

Answer 1

heya!
$= > when \: we \: put \: the \: object \: at \: centre \: of \: curvature \: or \: 2f \: then \: we \: get \: a \: real \: image \: of \: the \: same \: size \: as \: the \: object$