A student measures the focal length of a convex lens by putting an object pin at a distance `u` from the lens and measuring the distance `v` of the image pin. The graph between `u` and `v` plotted by the student should look like

A student measures the focal length of a convex lens by keeping an object pin at a distance u from the lens and measuring the distance v of the image pin. The graph between v versus u plotted will look like

Three students measured the focal length of a convex lens using parallel rays from a distant object. All of the measured the distance between the lens and the inverted image on the screen. (i) Student A saw a sharp image on the screen and labelled the distance as f_(1) (ii) Student B saw a slightly larger blurred image on the screen and labelled the distance as f_(2) (iii) Student C saw slightly smaller blurred image on the screen and labelled the distance as f_(3) The relation between the three measurements would most likely be :

The graph between the image distance (v ) and object distance (u) from the convex lens is

A small pin of size 5 mm is placed along principal axis of a convex lens of focal length 6cm at a distance 11cm from the lens. Find the size of image of pin. [7.2 mm]

For a convex lens, if real image is formed the graph between (u+v) and u or v is as follows