Why do we use sign convention twice? | Ray optics | Physics | Khan Academy скачать в хорошем качестве

Why do we use sign convention twice? | Ray optics | Physics | Khan Academy

We use sign convention once in derivation, and once while solving problems. Why do we use it twice? Let's understand that in this video! 00:00 Introduction 00:28 Deriving mirror equation for a concave mirror 04:21 Deriving mirror equation for a convex mirror 08:59 Different equations for different cases 09:28 Applying sign convention once 11:01 Benefit of using sign convention once 11:28 Applying sign convention the second time 13:31 Same goes for lenses Master the concept of Refraction of light by spherical mirrors through practice exercises and videos - https://www.khanacademy.org/science/i... Check out more videos and exercises on Ray optics and optical instruments - https://www.khanacademy.org/science/i... To get you fully ready for your exam and help you fall in love with Physics name, find the complete bank of exercises and videos for Class 12 Physics here - https://www.khanacademy.org/science/i... Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages. Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy. Subscribe to our YouTube channel -    / khanacademy   As a 501(c)(3) nonprofit organization, we would love your help! Donate here: https://www.khanacademy.org/donate?ut... Created by Vibhor Pandey