Question

the focal length of a concave mirror is 15 cm if the object distance is 60 cm find the image distance .(ans u =-20cm)​

Answer 1

Answer:

This is perfect answer.

Answer 2

Answer:

20cm

Explanation:

1/f=1/u+1/v where f=focal length, u=object distance and v=image distance.

Thus 1/v=1/f-1/u

             =1/15-1/60

             =1/20

         v=20cm