Important question on mirror formula:1/f=1/v+1/u

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📘 Important Questions on Mirror Formula (1/f = 1/v + 1/u) | Ray Optics Class 10–12 | Complete Explanation

Welcome to this detailed and student-friendly video on the Mirror Formula, one of the most important topics in Ray Optics for Class 10, Class 11, Class 12, NEET, JEE, SEE, and board exams. In this session, we explore the concept of focal length (f), image distance (v), object distance (u) and understand how they are connected through the famous relation:

👉 1/f = 1/v + 1/u

This video covers important theory, solved numerical questions, derivations, tricks, and exam-relevant problems so that you can score full marks in ray optics chapter.

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🔍 What You Will Learn in This Video

✔ Meaning of object distance (u)
✔ Meaning of image distance (v)
✔ Sign Convention for mirrors (New Cartesian Sign Rule)
✔ Derivation of mirror formula
✔ Relation between focal length, radius of curvature, and principal focus
✔ How to apply 1/f = 1/v + 1/u in numerical questions
✔ Calculation of magnification (m = –v/u)
✔ Difference between concave and convex mirror calculations
✔ Common mistakes made by students
✔ Step-wise solutions for all important board-level questions
✔ Tricks to solve any mirror formula question within seconds

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🧠 Why This Topic Is Important

The mirror formula is one of the most asked concepts in board exams, competitive exams, and school tests. If you understand this formula properly, solving ray optics numerical questions becomes very easy. This video focuses on the exact type of questions that appear frequently.

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📚 Included Important Questions

🔸 Find image distance when object distance and focal length are known
🔸 Numerical problems on concave mirror (real and virtual image)
🔸 Numerical problems on convex mirror (always virtual image)
🔸 Questions involving magnification and mirror formula together
🔸 Problems where v or u is negative (sign convention practice)
🔸 Higher-level conceptual questions for competitive exams

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⭐ Perfect for:
• Class 10 Science
• Class 11 Physics
• Class 12 Physics
• NEET/JEE Aspirants
• SEE Students
• CBSE, NEB, ICSE Board Preparation

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🔔 Don’t Forget To

👍 Like the video
💬 Comment your doubts
🔔 Subscribe for more physics lessons
📤 Share with friends preparing for exams

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