To find the focal length of a convex lens by plotting graphs between u and v
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What is Focal Length in Photography?
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optics - What is the actual significance of the focal point of a lens? - Physics Stack Exchange
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What Is Focal Length in Photography?
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Focal Length | COSMOS
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/principal-focal-point-(two-of-them)-convex-lens-36.77d7742.jpg "Principal focal point (two of them)")
Principal focal point (two of them)
