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Introduction      Pinhole      Refraction      Lens Basics      Thin Lens Lens Properties      Focusing      Image Appearance      Illustrations

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Illustrations

Figure 1: Bigshot's lens

Figure 2: Pinhole camera		Figure 3: Perspective distortion

Figure 4: Refraction through a glass slab

Figure 5: Geometry of refraction

θ1 θ2 n1 n2 Angle of incidence (θ1=45º) Angle of refraction (θ2=45º) Air (n1 = 1) Water (n1 = 1.33) Glass (n1 = 1.52) Sapphire (n1 = 1.77) Diamond (n1 = 2.4) Air (n2 = 1) Water (n2 = 1.33) Glass (n2 = 1.52) Sapphire (n2 = 1.77) Diamond (n2 = 2.4)

Figure 6: Select a material to see how it bends light

Figure 7a: Convex lens converges light		Figure 7b: Concave lens diverges light

Figure 8: A compound lens comprised of a convex and a concave lens

Figure 9: Imaging using a thin convex lens

Figure 10: Changing aperture of a lens using an iris

Figure 11: Focal point of a convex lens

Figure 12: Thin lens law

Car Position Sensor Position Aperture Size

Figure 13: Image formation

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