Question

Describe the image with a object distance of 65cm and a focal length of 20cm

Answer 1

Imag distance = 28.9 cm

Step-by-step explanation:

Given that,

Object distance, u = -65 cm

The focal length of the convex les, f = +20 cm

We need to find the image distance. The lens formula gives the relation between focal length, object distance and image distance is given by :

`(1)/(f)=(1)/(v)-(1)/(u)\\\\(1)/(v)=(1)/(f)+(1)/(u)\\\\(1)/(v)=(1)/(20)+(1)/(-65)\\\\v=28.9\ cm`

So, the image distance is 28.9 cm