Question

to find focal length of a cancave lens , using by a convex lens with readings​

Answer 1

Answer:

YOU CAN FIND IT IN THIS VEDIO

https://www.youtube.com/watch?v=6nO9bQMI7UE

Answer 2

Answer:

To determine focal length of a convex lens

To determine focal length of a convex lens Place the holder with the screen on the bench. The position of the screen should be such that the sharp image of the distant object is obtained on it. The difference between the position of the lens and the screen is equal to the focal length of the given convex lens.