Petzval field curvature 1970-01-01
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Plane of incidence 1970-01-01
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Pupil magnification 1970-01-01
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Radius of curvature (optics) 1970-01-01
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Ray (optics) 1970-01-01
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Ray tracing (graphics) 1970-01-01
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Real image 1970-01-01
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Reflection coefficient 1970-01-01
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Reflection (physics) 1970-01-01
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Refraction 1970-01-01
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William Alvin Howard 1970-01-01
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Sidney Morgenbesser 1970-01-01
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Sidney Redner 1970-01-01
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Snell's law 1970-01-01
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Snell's window 1970-01-01
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Sourav Chatterjee 1970-01-01
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Specular reflection 1970-01-01
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Spherical aberration 1970-01-01
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Stanisław Trybuła 1970-01-01
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Lancea (weapon) 1970-01-01
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