The radius of curvature of a mirror is 20cm the focal length is (a) 20 cm...
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The radius of curvature of a mirror is 20cm the focal length is (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm The radius of curvature of a mirror is 20cm the focal length is (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
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