Contents show 1 IMPORTANT TNPSC SCIENCE ONE LINER – PHYSICS 1.1 The focal length of a convex mirror whose radius of curvature 40 cm is 20 cm 1.2 A man has to exert a force of 10 N on the edge of a door to push it open. 20 N force will the man have … Continue reading ONE LINER – 2021:Physics – DAY – 32