A bi convex thin lens of glass focal length in air is 20 cm Now...
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A bi convex thin lens of glass focal length in air is 20 cm Now one of its convex face is silvered to make equivalen mirror In case i this equivalent mirror is kep in air and in case ii it is kept in wate 4 3 Then A B ha Radius of curvature of convex side of lens is 10 cm Focal length of equivalent mirror in both case is same C Focal length in case i is 5 cm D Focal length in case ii is 8 cm
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