Question

You have a lens . Suggest an experiment to find out the focal length

Answer 1

Answer:

We can try to  capture sharp image formed by lens on a screen of a distant object. Hence we can find the distance between lens and screen which is focal length.

Answer 2

Answer:

please mark as brainlist

Explanation:

Explanation: Place the white screen behind the lens such that the image of the object is formed on the screen. Now move the screen until you get a sharp, diminished & inverted image of the distant object. ... The difference between the lens mark & the screen mark will give the focal length.