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A plano-convex lens of refractive index 1.5 and radius of curvature 30 cm is silvered at the curved surface. At what distance from the lens an object be placed in order to obtain a real image of the size of the object?

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A plano-convex lens of refractive index 1.5 and radius of curvature 30 cm is silvered at the curved surface. At what distance from the lens an object be placed in order to obtain a real image of the size of the object?






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