https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:geometric-optics/x0e2f5a2c:mirror-formula-and-magnification/v/sign-conventions-for-mirror-lenses 2020-12-16T15:49:06Z Sign convention for mirrors (& lenses) Let's explore the sign conventions (rules to assign +ve and -ve values) we use for mirrors and lenses. These rules are called Cartesian sign conventions. Mahesh Shenoy video https://cdn.kastatic.org/googleusercontent/fsOjTc9-iwrQGTDfriaC6xdV8myBID9W5NAG7Q-twQpefDpBv1SnLQPcrGbufzrQ-Z5WA17LwzSw5JwEIr2RL9E Sign convention for mirrors (& lenses) Let's explore the sign conventions (rules to assign +ve and -ve values) we use for mirrors and lenses. These rules are called Cartesian sign conventions. https://cdn.kastatic.org/ka-youtube-converted/Mc--Yz_YrsU.mp4/Mc--Yz_YrsU.mp4 610 Sign convention https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:geometric-optics/x0e2f5a2c:mirror-formula-and-magnification/e/sign-conventions 2026-04-07T23:55:07.30621384Z Sign convention Let's practice problems involving the Cartesian sign convention for mirrors and lenses. Satrajit exercise