Question

At what distance should a object is placed from a convex lens of focal lens 18cm

Answer 1

Answer:

Length 18 cm to obtain an image at 24 cm from it on the other side.

Explanation:

Given,

f = 18cm

v = 24cm

according to lens makers formula.

1/f=1/v-1/u

1/18=1/24-1/u

u=-72 cm

by using the formula

m=v/u

m=24/(-72)

m=-0.3

negative sign indicates that the image formed is inverted.