The curvature radii of a concavo-convex glass lens are 20 cm and 60cm. The convex surface of thelens is silvered. With the lens horizontal, the concave surface is filled with water. The focal length of the effective mirror is (1 of glass = 1.5,41 of water 4/3) (A) 90/13 cm (B) 80/13cm (C) 20/3cm (D) 45/8cm
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The curvature radii of a concavo-convex glass lens are 20cmand 60cm.th convex surface of the lens is silvered .With the lens horizotnal ,the concave surface is filled with water.The focal length of the effective mirror is (muof glass=1.5,muof water=4//3
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132.1 K100.1 K1x1.5x2xAnswer
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