An object is placed at 60 m in front of a concave mirror. If its radius of curvature is 40 m, find the position of image.
30
For the given problem,
Sign conventions for u = -ve ( Left side of the mirror)
f = -ve ( Concave mirror)
Using mirror formula,
1v + 1u = 1f
⇒1v + 1−60 = −120
⇒1v = 1−360
⇒v=−30m
(Negative sign represents that object and image are on the same side of mirror.)