Question

A slide projector projects images on a screen. a) If the slide is 15.5 cm from the lens and the lens has a focal length of 15 cm, how far away is the screen

Answer 1

`d_(i)=465 cm=4.65 m`

Step-by-step explanation:

Using the thin lens equation, we have:

`(1)/(f)=(1)/(d_(o))+(1)/(d_(i))`

Where:

f is the focal length

d(o) is the distance of the object

d(i) is the distance of the image

`(1)/(15)=(1)/(15.5)+(1)/(d_(i))`

`(1)/(15)-(1)/(15.5)=(1)/(d_(i))`

`d_(i)=465 cm=4.65 m`

Therefore, the screen is at 465 cm.

I hope it helps you!