Question

if an object is placed at a distance of 25cm,if radius of lens is 18cm find the nature of the image if the height of object is 0.5cm?​

Answer 1

Answer:

Focal length of convex lens, f=8 cm

Object distance, u=−12 cm

Using lens formula

v

1

−

u

1

=

f

1

where v is the image distance.

∴

v

1

−

−12

1

=

8

1

⟹ v=+24 cm

(+ve sign indicates that image is formed behind the lens)

Hence the image formed is real and inverted