समतल दर्पण Complete Class ⚡ | Class 12 Physics Chapter 9 | Important Concepts + Questions

Class 12th | Physics Ch - 9| Ray Optics (किरण प्रकाशिकी) | Sunday Special Class | By Krishna Sir 🔥 Board Exam By Khan Sir - https://play.google.com/store/apps/de... 🚀 INTRODUCTION: स्वागत है बच्चों! आज की इस Sunday Special Class में हम Ray Optics के कठिन Concepts को मक्खन की तरह आसान बनाएंगे। 📌 ABOUT THIS VIDEO: इस वीडियो में Class 12 Physics Chapter 9 "Ray Optics" के सभी महत्वपूर्ण टॉपिक्स को गहराई से समझाया गया है। Krishna Sir ने 2026 Board Exams को ध्यान में रखते हुए Reflection, Refraction और Optical Instruments को कवर किया है। यह One Shot Revision आपके Concepts को Clear करने और Exams में Full Marks लाने में मदद करेगा। वीडियो को पूरा देखें और अपने दोस्तों के साथ शेयर करें। ✅ KEY HIGHLIGHTS: ⚡ Full Chapter One Shot Revision ⚡ Important Derivations for 2026 Boards ⚡ Concept of Reflection and Refraction ⚡ Lens Maker's Formula and Prism Theory ⚡ Practical Examples and PYQs YouTube Chapters / Timestamps 00:00 Class Introduction 01:42 Half Yearly Exam Discussion 03:56 UP Board Special Class Update 06:59 Previous Lecture Recap 08:05 Plane Mirror | समतल दर्पण Begins 08:20 Virtual Image in Plane Mirror 10:47 Object Distance & Image Distance 11:19 Focus & Radius of Curvature of Plane Mirror 14:45 Object Distance = Image Distance 15:23 Plane Mirror Image Formation Diagram 20:06 Object-Image Distance Proof 24:01 Object & Image Distance Result 24:29 Object and Image Velocity 25:01 Condition When Mirror is at Rest 29:58 Case 1 – Object Moving Perpendicular to Mirror 31:31 Object & Image Distance Relation 34:33 Velocity Relation Derivation 36:26 Object & Image Velocity 38:56 Perpendicular Motion Concept 44:35 Moving Mirror Condition 45:36 Mirror at Rest Special Case 50:58 Relative Velocity Concept 51:14 Image Velocity Relative to Object 01:02:52 Relative Velocity = Double Concept 01:05:40 Numerical / Concept Example 01:11:33 Case 2 – Object Moving Parallel to Mirror 01:12:13 Parallel Motion of Object 01:16:42 Relative Velocity in Parallel Motion 01:18:50 Minimum Length of Plane Mirror 01:19:11 Mirror Height = Half of Object Height 01:20:46 Person & Mirror Diagram 01:41:22 Height of Mirror Derivation 01:43:14 Final Result – Mirror Height = H/2 01:45:25 Rotation of Plane Mirror 01:45:33 Mirror Rotated by α → Reflected Ray Rotates by 2α 01:48:45 Rotation Angle Explanation 01:54:12 2α Derivation 01:54:35 Final Rotation Result 01:56:40 Two Plane Mirrors at 90° 01:57:19 Perpendicular Plane Mirrors 02:02:28 Incident & Final Reflected Ray Relation 02:02:58 Two Mirrors Inclined at θ 02:03:47 Symmetry & Non-Symmetry Cases 02:05:16 Symmetrical Position of Object 02:07:23 Non-Symmetrical Position 02:08:54 Number of Images Formula 02:12:42 Symmetry Case Revision 02:13:23 Number of Images Rule 02:17:13 When 360/θ is Fractional 02:19:00 Number of Images Examples 02:29:42 Two Parallel Plane Mirrors 02:30:19 Number of Images in Parallel Mirrors 02:32:28 Multiple Reflection Concept 02:38:24 Deviation Due to Reflection 02:38:44 Angle of Deviation 02:41:28 Deviation Angle Derivation 02:47:01 Numerical – Angle of Incidence 02:48:22 Deviation Numerical 02:50:21 Special Cases of Deviation 02:52:28 Normal Incidence – Deviation 02:53:51 Parallel Incidence Case 02:57:28 Class Ends 🔥 TOPICS COVERED: Reflection of Light, Spherical Mirrors, Refraction, Total Internal Reflection, Lenses, Power of Lens, Prism, Scattering, Optical Instruments, Microscope, Telescope, Ray Optics Class 12, Physics Chapter 9. 📢 JOIN OUR COMMUNITY: 🔔 Subscribe: [Link] 👍 Like & Share! 📈 SEO SEARCH TERMS: Ray Optics Class 12 | Physics Chapter 9 Kiran Prakashiki | 12th Physics Board Exam 2026 | Ray Optics One Shot Krishna Sir ⚠️ DISCLAIMER: This video is for educational purposes only. All content is designed to help students prepare for their academic examinations. #RayOptics #Class12Physics #Physics2026 #KiranPrakashiki #KrishnaSir #BoardExams2026 #PhysicsPreparation #OneShotPhysics #RayOpticsClass12 #Chapter9Physics #ScienceStudents #StudyHard #Education #PhysicsConcepts #NCERTPhysics #BoardExamPreparation #SundaySpecialClass #PhysicsNotes #Refraction #Reflection #PhysicsLover #ExamTips #Class12Science #PhysicsTutorial #OnlineLearning #PhysicsTricks #OpticalInstruments #Prism #PhysicsByKrishnaSir #LearnPhysics