Question

A point source of light is kept in front of a convex mirror which has a radius of curvature 60

cm. The image is formed 15 cm behind the mirror. The object distance will be​

Answer 1

use the mirror formula

1/f=1/v +1/u

R=+60 cm as it is a convex mirror

v = +15cm as it is formed behind the mirror

for sigh convention u need to draw ray diagram

u= -20cm