Question

An object of 10cm in length is held 30cm away from a convex lens of focal length 3
20cm. Find the position, size and nature of the image.
l e circuit diagram and find the total equivalent resistance of​

Answer 1

Answer:

h = 10 cm,   v = v

u = -30 cm,  h' = h'

f = 20 cm

1/v - 1/u = 1/f

1/v + 1/30 = 1/20

1/v = 1/20 - 1/30

1/v = 3-2/60

v = 60 cm

v/u = h'/h

60/-30 = h'/10

-2 = h'/10

-20 = h'

h' = -20 cm

Therefore, the image will be formed 60 cm from the convex lens, the image formed will be real, the image formed will be inverted.