Question

Find the image distance f=15cm object distance=-20

Answer 1

Answer:

image distance [v]=9.09 cm

Explanation

according to mirror formula

1/f=1/v+1/u

1/15=1/v+1/-20

-1/v=1/-20-1/15

-1/v=-0.05-0.06

-1/v=-0.11

-1=-0.11v

v=-1/-0.11

v=9.09 cm