Question

object distance (u)=40cm , focal length (f)=20cm find the image distance


heye Frnds it's urgent plzzzzzz ans soon​

Answer 1

Answer: 40cm IS THE ANSWER.

Explanation:

1/f=1/v+1/u

==>1/v=1/f-1/u=1/20-1/40=1/40

==>v=40cm

IN GENERAL GIVEN THE OBJECT IS PLACED AT CENTRE OF CURVATURE SO IMAGE DISTANCE IS SAME AS OBJECT DISTANCE. SO ANSWER IS 40cm.

HOPE IT HELPS YOU............

THANK YOU.