Sign Convention of Mirror and Lens Formulae | Class 9 Physics | CBSE Board |

Confused about which signs to use in mirror and lens problems? You're not alone!
In this easy-to-understand video, we explain the sign convention rules used in mirror formula and lens formula, helping you solve numericals accurately and avoid common mistakes.

Topics Covered:
Sign convention for concave & convex mirrors
Sign convention for converging & diverging lenses
Real vs. virtual images: sign differences
Mirror formula
Lens formula
Examples and quick tips for exam questions

Perfect for Class 9 students studying Light – Reflection and Refraction, and for building a solid base for Class 10 & NEET/JEE prep.

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