Question

an object placed at a distance of 20 CM in front of convex mirror of radius 30 cm find the position and ionic native of the image

Answer 1

Given

u= - 20 cm  

r= +30 cm

r/2=f

30/2=f

f=15 cm

using mirror formula

1/f=1/v + 1/u

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

1/15+1/20 = 1/v

(20 + 15)/300 = 1/v

1/v = 35/300

v = 300/35

v = 8.57 cm

image distance v = 8.57 cm

i mage formed is virtual