1.A long-sighted person has a minimum distance of distinct vision of 50 cm50\,\text{cm}50cm. He wants to reduce it to 25 cm25\,\text{cm}25cm. He should use aa.Concave lens of focal length 50 cm50\,\text{cm}50cmb.Convex lens of focal length 25 cm25\,\text{cm}25cmc.Convex lens of focal length 50 cm50\,\text{cm}50cmd.Concave lens of focal length 25 cm25\,\text{cm}25cmLogin to continueOnly logged in users canattempt or see the solution.
