Ray Optics and Optical Instruments 11|Comound Microscope and Telescope|Physics Class 12

📘 Ray Optics and Optical Instruments 11 | Compound Microscope & Telescope | Class 12 Physics | CBSE 2026

Welcome to Shree Ram Educators, dear Class 12 Physics students!
In this detailed lecture, Vikas Singh Sir explains two of the most important optical instruments from your Ray Optics chapter — the Compound Microscope and the Astronomical Telescope. These topics carry high weightage in CBSE boards and are frequently asked in PYQs.

⭐ What You Will Learn in This Video:

🔍 Compound Microscope:
✔️ Construction & working principle
✔️ Ray diagram with proper labelling
✔️ Magnifying power formula (derivation + shortcuts)
✔️ Numerical based on microscope

🔭 Astronomical Telescope:
✔️ Working principle & important concepts
✔️ Ray diagram (Normal adjustment & LDDV)
✔️ Magnifying power of telescope (with formula)
✔️ Comparison between microscope & telescope

📌 PYQs from CBSE 2015–2024
📌 Common mistakes and exam tips

🎯 Who Should Watch This Video?

• Class 12 CBSE Physics 2025–26 students
• NCERT + Exemplar learners
• Pre-board & Board exam aspirants
• Ray Optics revision and numerical practice
• JEE/NEET foundation students

🔑 High-SEO Keywords:

Compound Microscope Class 12, Telescope Class 12 Physics, Optical Instruments Class 12, Ray Optics Class 12, Magnifying Power Class 12, Astronomical Telescope Notes, Compound Microscope Ray Diagram, CBSE 2026 Physics, NCERT Optical Instruments, Shree Ram Educators, Vikas Singh Sir Physics.

⏳ Timestamps:

0:00 – Introduction
1:10 – Compound Microscope Concept
4:40 – Ray Diagram (Microscope)
8:15 – Magnifying Power Formula
12:25 – Astronomical Telescope Basics
15:40 – Telescope Ray Diagram
19:30 – Magnifying Power (Telescope)
23:50 – PYQs Discussion
29:20 – Final Revision Tips
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