Question

An object is placed at a distance of 12 cm from a convex lens of focal length 8 cm. Find :

1) the position of the image

2) nature of the image

Answer 1

1)

Given data:

u = -12 cm, f = +8 cm, v = ?

Lens formula

`1/v - 1/u = 1/f`

`1/v - 1/(-12) = 1/8`

`1/v = 1/8 - 1/12`

v = 24 cm [Position of Image]

2) Nature if image : Real, inverted and magnified.