Question

In an optics experiments, with the position of the object fixed, a student varies the position of a convex lens and for each position; the screen is adjusted to get a clear image of the object. A graph between the object distance u and the image distance v, from the lens, is plotted using the same scale for the two axes. A straight line passing through the origin and making an angle of 450 with the x-axis meets the experimental curve at p. The coordinates of p will be 

(a) (2f, 2f) 

(b) ((f/2),(f/2)) 

(c) (f, f) 

(d) (4f, 4f) 

Answer 1

It is possible when object kept at centre of curvature u=v, u= 2f, v=2f.