Скачать или смотреть LENS | Full Chapter Explanation in One Shot | WBBSE Class 10 Physical Science | Madhyamik Focus

Learn the complete Lens chapter for WBBSE Class 10 Physical Science strictly according to the Madhyamik 2026 syllabus.
This lecture by Arjun Sir (Arjun Classes) explains every concept clearly with ray diagrams, — perfect for last-minute revision and full conceptual understanding.

📘 What’s Inside:
[00:14] What is a Lens?
[01:36] Types of Lenses (Convex and Concave)
[03:49] Definitions: Convex (thick center) vs. Concave (thin center)
[05:33] Geometry of a Convex Lens
[07:49] Definition: Center of Curvature
[09:22] Definition: Principal Axis
[10:17] Definition: Optical Center
[11:25] Key Property of Optical Center Undeviated Ray
[14:20] Geometry of a Concave Lens
[16:54] Rules for Ray Diagrams
[19:08] Rules for Convex Lens (Parallel Ray, Optical Center Ray, Focus Ray)
[24:19] Convex Lens as a Converging Lens
[26:30] Rules for Concave Lens (Parallel Ray, Optical Center Ray, Focus Ray)
[31:22] Concave Lens as a Diverging Lens
[32:29] Image Formation by Convex Lens (5 Positions)
[33:35] Object Beyond 2F₂
[36:06] Object at 2F₂
[39:39] Object Between 2F₂ and F₂
[41:00] Object at F₂ (Image at Infinity)
[43:38] Object Between F₂ and Optical Center (Virtual Image)
[45:31] Image Formation by Concave Lens
[46:15] Object at Infinity
[48:11] Object at any other position (Always virtual, diminished, erect)
[51:06] Magnification (m)
[52:36] Definition: Size of Image / Size of Object
[53:30] Understanding Magnification Values

[56:26] Alternate Formula: Image Distance / Object Distance
Types of Lenses (Convex & Concave)
Image Formation by Lenses
Sign Convention
Lens Formula & Magnification
Important Numerical Problems (Board-Oriented)
Common Mistakes & Exam Tips

🎯 Ideal For: WBBSE Class 10 Students preparing for Madhyamik 2026
👨‍🏫 Taught by: Arjun Sir | Arjun Classes
📺 Watch till the end for concept clarity and exam tricks!

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