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17. Diameter of a plano-convex lens is 6 cm andits thickness at the centre is 3 mm. The radiusof curvature for the convex surface is:A. 3 cmB. 12 cmC. 15 cmD. 5.7 cm

Answer» 17. Diameter of a plano-convex lens is 6 cm andits thickness at the centre is 3 mm. The radiusof curvature for the convex surface is:A. 3 cmB. 12 cmC. 15 cmD. 5.7 cm


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