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Astigmatism

Check us out at http://www.tutorvista.com/content/physics/physics-ii/light-refraction/astigmatism.php What is Astigmatism An optical system with astigmatism is one where rays that propagate in two perpendicular planes have different foci. If an optical system with astigmatism is used to form an image of a cross, the vertical and horizontal ...

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