Question

an object at a distance of 30 cm from concave mirror gets its image at the same point.Find focal length of the mirror is​

Answer 1

Answer:

15 cm

Explanation:

Object distance , u=+30cm and image distance v=+30cm

If f be the focal length, 1/f=1/u+1/v=1/30+1/30=1/15 or f=15cm

HOPE IT HELPS YOU