Relationship between Radius of Curvature and Focal Length(R=2f)| Spherical Mirror | Class 12 Physics

📘 Welcome to Physics Mestru!
In this video, we derive the *relationship between the radius of curvature (R) and focal length (f) of a spherical mirror**, one of the most fundamental and frequently asked derivations from **Ray Optics and Optical Instruments* in Class 12 Physics.

This derivation applies to both *concave and convex mirrors* and is important for *CBSE, ICSE, Karnataka PUC* board exams as well as *NEET & JEE* preparation.

📚 What you will learn:
• Meaning of principal focus and radius of curvature
• Ray diagram explanation for spherical mirrors
• Step-by-step derivation showing *R = 2f*
• Physical interpretation of the relation
• Applicability to concave and convex mirrors
• Important exam presentation tips

🔍 Syllabus covered:
• CBSE Class 12 Physics
• ICSE / ISC Physics
• Karnataka PUC
• NEET & JEE Main / Advanced Ray Optics
• All State Board Class 12 Physics syllabi

🎯 Ideal for:
• Board exam derivation questions
• Students revising Ray Optics basics
• NEET & JEE aspirants strengthening fundamentals
• Teachers and students looking for clear concept explanation

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📌 Related Videos:
▶ Derivation of Mirror Formula
▶ Magnification by Spherical Mirrors
▶ Ray Optics Complete Playlist – Class 12 Physics

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