Question

A candle is placed 15.0 cm in front of a convex mirror. When the convex mirror is replaced with

a plane mirror, the image moves 7.0 cm further away from the mirror. Find the focal length of

the convex mirror.​

Answer 1

Answer:

1/f=1/v-1/u

1/f=1/15.0-1/7.0

1/f=8/105