Question

find the position nature and size of the image formed by a convex lens of focal length 20 CM of objects and 4 cm high placed at a distance of 30 cm from it​

Answer 1

Answer:

Explanation:

f=20cm

u=30cm

h=4cm

v=?,h'=?

1/v-1/u=1/f

1/v=1/20+1/-30

1/v=1/20-1/30

1/v=(3-2)/60

1/v=1/60

v=60cm

-v/u=h'/h

-60/30=h'/4

-2×4=h'

h'=-8

h'=8cm, reverse image

Answer 2

Answer:

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