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If parallel beams, non-parallel to principal axis fall on the convex lens, they converge at a point: (a) On principal axis (b) Away from principal axis (c)

Centre of curvature (d) Called focus on the axis


If these parallel beams non parallel to principal axis fall on convex lens, one may pass through optic centre and pass without any deviation. another may pass through focus and after refraction passes parallel to principal axis. so they converge at a point away from principal axis.
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