Question

you have lens.suggest an experiment to find out the focal length of the lens​

Answer 1

Answer:

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.

Answer 2

please one candle and some fast maximum 20 place a would like structure and keep on it lens and then some 40cm keep on screen like paper or cardboard white one and then the image with form on F1 and F2 like this you can do

Explanation:

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