Question

1) 10 cm 2) 15 l ) 20
• An object is placed 20 cm from the surface of
a convex mirror and a plane mirror is set so
that virtual images formed by two mirrors
coincide. If plane mirror is at a distance of 12
cm from object, then the focal length of convex
mirror is
1) 5 cm 2) 10 cm 3)20 cm 4) 40 cm​

Answer 1

Answer:

24cm distance from mirror