Q.) An object is placed 40 cm from the concave
mirror with a focal length of 20 cm. The
image formed is:
(a) behind the mirror (b) between the mirror and focus
(c) at focus (d) centre of curvature of mirror
Ans: (d) centre of curvature of mirror Explanation: Given focal length of concave mirror, f = – 20 cm Distance of object from concave mirror, r = – 40 cm From the mirror formula
