Question

③ An object of height 2cm is placed in front of a converging lens of focal length 20cm an image is formed at a distance of 30cm from the lens. find the object distance and height of the write characteristics of the image? ​

Answer 1

Explanation:

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Answer 2

Explanation:

f=20cm, v= 30cm , h=2cm

lens formula, 1/f =1/v - 1/u

1/20 = 1/30 -1/u

1/u = 1/30- 1/20

=(2-3)/60

1/u = - 1/60

u= -60cm

h' / h = v/u ( magnification formula)

h'/ 2 = 30/(-60)

h'= -1

height of image = 1cm, minus sign indicates that the image forms below principal axis and real