Spherical Mirror & Thin Lens with Same Focal Length −15 cm | Concave Mirror & Concave Lens Explained

Spherical Mirror & Thin Lens with Same Focal Length −15 cm | Concave Mirror & Concave Lens Explained YouTube Video Description: In this video, we explain an important Class 10 Physics question based on Light – Reflection and Refraction 🔍✨ A spherical mirror and a thin spherical lens both have a negative focal length of −15 cm. Using the sign convention, we identify the nature of the mirror and the lens clearly and conceptually. 👉 Key Concept Explained: • Why negative focal length indicates a concave mirror 🪞 • Why negative focal length indicates a concave lens 👓 • Important board exam logic and MCQ concept • Based strictly on NCERT Class 10 syllabus This question is very important for Board Exams, MCQs, and numericals 💯 Perfect for students preparing for CBSE / UP Board / State Boards 📚 🧠 What You Will Learn in This Video: ✅ Sign convention of focal length ✅ Difference between concave mirror & concave lens ✅ How to identify optical instruments from focal length ✅ Exam-oriented explanation in simple language 🔍 SEO Keywords (Tags): spherical mirror focal length thin spherical lens focal length negative focal length physics concave mirror class 10 concave lens class 10 light reflection and refraction ncert physics class 10 board exam physics physics numerical questions 🔖 Hashtags: #SphericalMirror 🪞 #ThinLens 👓 #ConcaveMirror #ConcaveLens #NegativeFocalLength #Class10Physics #NCERTPhysics #LightReflection #LightRefraction #BoardExamPreparation 📘✨