Question

object of the height 1.2 is a place @ the focal length 20cm is a real image is formed at the distance of the 60 cm from its find the position of the day what is the height of the image formed

Answer 1

99cm is the ans wer in maths.......

Answer 2

Answer:

u = 30 cm

$\display \text{h _i = 2.4 m}$

Explanation:

We have given :

Focal length = 20 cm

Image distance =  60 cm

We have to find object distance .

We know :

1 / f = 1 / v + 1 / u

Since image formed is real :

f = - 20 cm and v = - 60 cm

1 / u = 1 - 3 / 60

u = - 30 cm

Hence object distance is 30 cm .

Also given object height = 1.2 m

We know :

h_i / h_o = - v / u

h_i / 1.2 = - 60 / 20

h_i = - 2.4 m

Hence image height is 2.4 m .