Question

an object kept 60 cm from a lens gives a virtual image 20 cm in front of the lens what is the focal length of the lens ? is it a converging lens or diverging lens ? ❤️❤️❤️ help me plz ❤️❤️❤️​

Answer 1

HERE IS YOUR ANSWER :-

Given,

Onject distance, u = - 60 cm

image distance, v = - 20 cm

Focal length, f = ?

Now, using the lens formula,

1/f = 1/v - 1/u

= 1/(-20) - 1/ (-60)

= 1/60 - 1/20

= 1 - 3 / 60

= - 2/ 60

i.e., focal length, f = - 30 cm

Hence, the lens is a diverging less with focal length of 30 cm.

Mark as brainliest☺☺

Thanx ❤❤❤