Question

01.a virtual erect and magnified image of an object is formed by a convex lens.
the position of the object is
(a) between f and 2f
(b) between 2f and infinity
(c) at the focus
(d) between f and optical centre
or in an experiment the image of a distant object formed by a concave mirror is
obtained on a screen. to determine the focal length of the mirror we should
measure the distance between the
(a) mirror and screen
(c) object and screen
(b) mirror and object
(d) none of the above

Answer 1

1--c-----------------