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Chapter 34b - Thin Lenses Last time we considered image...

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Thin Lenses Last time we considered image formation by a single spherical surface where the light rays are refracted (deviated) upon crossing the (spherical) interface. i θ r θ i r p 1 n 2 n 1 2 2 1 n n n n p i r + =
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It is the deviation of the rays on refraction through the surface (in accord with Snell’s law) that causes the convergence or divergence of the rays that leads to image formation. r p 1 2 n n = If there is no change in refractive index no image can form.
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