#### Question

What is the position of image when an object is placed at a distance of 10 cm from a convex lens of focal length 10 cm?

#### Solution

Given:

Object distance, u = -10 cm

(Since object is always placed on the left side of lens)

Focal length, f = +10 cm

According to lens formula:

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

`1/v=1/f+1/u`

`1/v=1/10=(-1/10)=0`

`v=1/0= oo`

Therefore, the position of image will be at infinity.

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Solution What is the Position of Image When an Object is Placed at a Distance of 10 Cm from a Convex Lens of Focal Length 10 Cm? Concept: Refraction of Light - Image Formation by Lenses - Convex Lens.