Question

Question 20

5 pts
A 3.00-cm tall light bulb is placed at a distance of 50 cm from a thin convex lens having a focal length of
13 cm. What is the image distance?

Answer 1

The image distance is 17.56 cm

Step-by-step explanation:

We have,

Height of light bulb is 3 cm.

The light bulb is placed at a distance of 50 cm. It means object distance is, u =-50 cm

Focal length of the lens, f = +13 cm

Let v is distance between image and the lens. Using lens formula :

`(1)/(f)=(1)/(v)-(1)/(u)\\\\(1)/(v)=(1)/(f)+(1)/(u)\\\\(1)/(v)=(1)/(13)+(1)/((-50))\\\\v=17.56\ cm`

So, the image distance is 17.56 cm.