If the focal length of a lens for marginal rays and paraxial rays are $12.5cm$ and $13cm$ respectively, the longitudinal spherical aberration is-(A) $0.25cm$(B) $0.5cm$(C) $0.75cm$(D) $1cm$
Thin lens - Wikipedia
Paraxial Ray Trace Equations and Building a YNU Spreadsheet, with an Example - YouTube
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2. From Snell's law to Vergence formula - Docteur Damien Gatinel
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PPT - Lenses in the Paraxial Limit PowerPoint Presentation, free download - ID:1542064
Thin lens - Wikipedia
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File:1 to 1 telecentric 2L paraxial relay lens.png - Wikimedia Commons
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Aberrations
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OSN: PreDesigner - free optical layout tool - lens calculator - paraxial or Gaussian beam - lens diagram, lens angle, beam waist, beam divergence, Rayleigh range, image size, lens focus, lens focal
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Figure 2.10 — Focusing a paraxial light beam — Optical Tweezers: Principles and Applications
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