Answer to Question #46572 in Physics for irebami

Question

In practical experiment inloving the use of optical pins, parallax is reduced or removed if on slightly displacing one's eye from side to side.

the object and image are not coincident but move together in same directions
the object and image move in opposite directions relative to each other
the object and image are coincident and move together in the same direction
the object and image are coincident and remain stationary