Question

h=5 cm
R = 30 cm
u=20 cm
V.= ?
m-=?
h'=?​

Answer 1

Answer:

2.2cm is correct answer

Explanation:

===>R = 30cm

===>f = R/2 = 30/2 = 15cm.

===>u = -20.

===>h = 5cm

===>1/v+1/u = 1/f.

===>1/v = 1/15+1/20 = 7/60

===>V = 60/7 = 8.6 cm

so, image is virtual and erect and formed behind the mirror.

===>hi/ho = v/u

===>hi/5 = 8.6/20

===>hi = 2.2 cm.

Hence, size of the image is 2.2 CM.