Answer to Question #211384 in Physics for Chizzy

Question #211384

An object 1.00cm high is placed 18.0cm from a converging lens forms a real image 2.00cm high. Calculate the focal length of the lens

Expert's answer

"m=-\\frac{v}{u}=-\\frac{v}{18}=-\\frac{2}{1}\\\\v=36\\ cm\\\\\n\\frac{1}{f}=\\frac{1}{18}+\\frac{1}{36}\\\\f=12\\ cm"

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