How do you calculate the focal length of a lens? - ProProfs Discuss
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How do you calculate the focal length of a lens?



This question is part of Test: Light and Optics
Asked by Songj, Last updated: Jan 14, 2020

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2 Answers

John Adney

John Adney

Answered Jan 26, 2017

Larger and virtual!

magnification = - (image distance)/(object distance)
 

John Smith

John Smith

Answered Dec 14, 2016

Smaller and virtual
 

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