Page 1 - HA-reflection through concave mirror

Objective Questions:

1. An object is placed at 100 mm in front of a concave mirror which
produces an upright image (erect image). The radius of curvature of the
mirror is:
(a) Less than 100 mm

(b) Between 100 mm and 200 mm

(c) Exactly 200 mm

(d) More than 200 mm

2. Which position of the object will produce a magnified virtual image, if a
concave mirror of focal length 15 cm is being used?
(a) 10 cm

(b) 20 cm

(c) 30 cm

(d) 35 cm

3. A concave mirror produces a magnification of +4. The object is placed:
(a) At the focus

(b) Between focus and centre of curvature

(c) Between focus and pole

(d) Beyond the centre of curvature

4. Two big mirrors A and B are fitted side by side on a wall. A man is
standing at such a distance from the wall that he can see the erect image
of his face in both the mirrors. When the man starts walking towards the
mirrors, he finds that the size of his face in mirror A goes on increasing
but that in mirror B remains the same:
(a) Mirror A is concave and mirror B is convex

(b) Mirror A is plane and mirror B is concave

(c) Mirror A is concave and mirror B is plane

(d) Mirror A is convex and mirror B is concave