Question

an object located 34.8 cm in front of a lens forms an image on a screen 9.21 cm behind the lens. find the focal length of the lens. answer in units of cm

Answer 1

7.3 cm

Step-by-step explanation:

focal length =

`(uv \\ )/(u + v)`

`((34.8)(9.21))/(34.8 + 9.21)`

Therefore, the answer is 7.28 cm.