Lens Formula & Magnification 🔍 | Class 10 Physics Chapter 9 | Light Reflection & Refraction #physics
Welcome to School24x7! In this video, we continue Class 10 Science Chapter 9 – Light: Reflection and Refraction (Part 7) and focus on the mathematical concepts of spherical lenses—the Lens Formula and Magnification. This lecture explains how to apply formulas for convex and concave lenses, how to use the New Cartesian Sign Convention, and how to interpret answers to determine the nature, size, and position of images. Step-by-step numerical problems are solved exactly as per the NCERT syllabus and board exam pattern. 📘 Topics Covered in This Video: 🔹 1. Lens Formula Statement and application of the lens formula Formula: 1/f = 1/v + 1/u Meaning of focal length (f), image distance (v), object distance (u) Applicability to convex and concave lenses Correct use of sign convention 🔹 2. Magnification by Lenses Meaning of magnification Formula: m = hᵢ / h₀ = v / u Positive vs negative magnification What magnification tells about the image: ✔ Size (magnified/diminished) ✔ Nature (erect/inverted) 🔹 3. Numerical Problems Solved examples for both convex and concave lenses Step-by-step method to substitute values How to check the reasonableness of answers Common mistakes to avoid in exams 🎯 What You Will Learn: ✔ How to apply the lens formula correctly ✔ How to calculate magnification and interpret results ✔ Proper use of sign convention ✔ Confidence in solving board-level numericals ✔ Strong base for ray optics questions 📚 Perfect For: Class 10 CBSE & NCERT Students Board exam preparation Students revising lens numericals and concepts 🔔 Subscribe to School24x7 for complete NCERT Science & Maths chapter-wise lectures. 👍 Like, Share & Comment your doubts—we’ll help you step by step! Class 10 Lens Formula and Magnification Lens Formula Class 10 Physics Magnification by Spherical Lenses Class 10 Light Reflection and Refraction Class 10 Part 7 Convex Lens Formula Class 10 Concave Lens Magnification Class 10 Lens Formula Numericals Class 10 Ray Diagram Lens Class 10 NCERT Class 10 Physics Chapter 9 Class 10 Physics Lens Formula Explained CBSE Class 10 Light Chapter Full Explanation Board Exam Physics Class 10 Lens Problems #Class10Science #LightReflectionRefraction #LensFormula #Magnification #SphericalLenses #ConvexLens #ConcaveLens #ImageFormation #RayDiagram #CBSEClass10 #NCERTScience #BoardExam2025 #PhysicsClass10 #Class10Physics #ScienceExplanation #NumericalsOnLens #LensFormulaNumericals #MagnificationFormula #CBSEPhysics #NCERTClass10 Class 10th Maths – Complete NCERT Chapterwise Series | School 24x7: • 📕Class 10th Maths – Complete NCERT Chapter... class 10th Economics – Understanding Economic Development: • 📕Class 10th Economics – Understanding Econ... Class 10th Geography – Contemporary India - II: • 📕Class 10th Geography – Contemporary India... Class 9th Science Full Chapter Wise NCERT Course | CBSE 2025-26 | School 24x7: • 📘Class 9th Science Full Chapter Wise NCERT... Class 10 Science Full NCERT Course | Chapter-wise Complete Preparation | School 24x7: • 📕Class 10 Science Full NCERT Course | Chap... Class 9th Mathematics: • 📘Class 9th Maths – Complete NCERT Chapterw... Class 10 Science Full NCERT Course | Chapter-wise Complete Preparation | School 24x7: • 📕Class 10 Science Full NCERT Course | Chap... Class 9th Science Full Chapter Wise NCERT Course | CBSE 2025-26 | School 24x7: • 📘Class 9th Science Full Chapter Wise NCERT... Foundation to Advance: Class 9 & 10 Maths Explained: • Playlist Class 9th History - India and contemporary world I: • 📘Class 9th History - India and contemporar... class 10th History – India and the Contemporary World - II: • 📕Class 10th History – India and the Contem... Class 9th Civics – Complete NCERT Series | School 24x7: • 📘Class 9th Civics – Complete NCERT Series ... Class 10th Political Science (Civics) – Democratic Politics - II: • 📕Class 10th Political Science (Civics) – D...
