Question

An object is placed vertically at a distance of 20 from a convex lens. If the height of the object is 10 cm and the focal length of the lens is 10 cm. The position size & nature of the image is​

Answer 1

Answer:

at 2f2(behind opposite side of object),same height as that of object,real and inverted,

Answer 2

Explanation:

u= - 20 cm

ho=10 cm

f=- 10cm

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

1/v-1/-20=1/-10

1/v=1/-20-1/-10

1/v=1/-20-2/-20

=1-2/+20

v= 20cm

m=h'/ho=-v/u

m=h'/10= -(20)/-20

h'=20×10/20

h'=10 cm