Define focal length.
Focal length, explained by RP; focal distance, dioptric power, curved mirror, lens equation, microscope, photographic objective, focus, beam radius
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Lesson 4 Define the terms principal axis, focal point, focal length and linear magnification as applied to a converging (convex) lens. Define the power. - ppt download
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What is Focal Length in Photography? - Focal Length Explained
What is Focal Length in Photography? - Focal Length Explained
What Is Focal Length in Photography?
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