Physics, asked by satyamgupta792004, 1 year ago

Why we write 2F' in convex lenses, what does it mean and why we not write this in the case of concave mirror?

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Answered by knoeledgebooster

Generally lenses have two centre of curvature ..here for clarity of representation we write 2f or 2f' ...as radius of curvature is twice focal length...

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