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An observer whose least distance of distinct vision is 'd', views his own face in a convex mirror of radius of curvature 'r'. Prove that the magnification cannot exceed r/[d+(d 2 +r 2 ) 1/2 ].

An observer whose least distance of distinct vision is 'd', views his own face in a convex mirror of radius of curvature 'r'. Prove that the magnification cannot exceed r/[d+(d2+r2)1/2].

Grade:12

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