Question

an object is placed 10cm in front of a convex mirror of focal length is 20 centimetre the distance of the image from the mirror is ________​

Answer 1

Answer:

v=20cm

Explanation:

(object distance)u=10 cm , f=20 cm ,(image distance) v =?

according to mirror formula,

1/f=1/u+1/v

1/20=1/10+1/v

1/v=1/20-1/10

=20-10/200

=10/200=1/20

hence, v = 20 cm