Ray Optics L15 | Microscope & Telescope Complete Theory | Compound Microscope,Astronomical Telescope

Ray Optics Lecture-15 | Microscope & Telescope Complete Theory | Compound Microscope, Astronomical Telescope | Class 12 Physics | Unnati Gyan Ka | Ehsan Sir TELEGRAM : https://t.me/unnatl TELEGRAM GROUP FOR 11TH (DOWNLOAD NOTES) https://t.me/+IGCxH-lYk140OTA1 TELEGRAM GROUP FOR 12TH (NOTES DOWNLOAD HERE) : https://t.me/+bFTSumidLKk3MWE1 📘 Class 12 Physics – Ray Optics Lecture-15 Is lecture mein hum Optical Instruments ka complete theory cover karte hain— Simple Microscope, Compound Microscope, Astronomical Telescope (normal adjustment & near point), with ray diagrams, derivations, magnifying power formulas, limitations and comparisons—all NCERT-based and exam-oriented. 👨‍🏫 Taught by: Ehsan Sir (Teaching Since 2009) 📺 Channel: Unnati Gyan Ka (@U.G.K2009) 📚 Topics Covered in Lecture 15 1️⃣ Introduction to Optical Instruments • Resolving power (idea) • Magnification vs magnifying power 2️⃣ Simple Microscope (Magnifying Glass) • Principle & ray diagram • Magnifying power (near point & infinity) 3️⃣ Compound Microscope • Construction & working • Ray diagram • Magnifying power (near point & infinity) • Length of microscope, tube length • Limitations 4️⃣ Astronomical Telescope • Construction & working • Normal adjustment (final image at ∞) 5️⃣ Comparisons (Exam Favourite) • Microscope vs Telescope • Simple vs Compound Microscope 6️⃣ Numericals (NEET/JEE/Boards) • Magnifying power problems • Length calculations • Sign convention checks 7️⃣ Common Mistakes & Exam Tips 🎯 Who Should Watch? ✔ Class 12 Board Students ✔ NEET 2026 Aspirants ✔ JEE 2026 Aspirants ✔ Students revising Ray Optics – Optical Instruments ✨ NCERT + PYQs + Clear Ray Diagrams ✔️ Taught by: Ehsan Sir (Teaching Since 2009) ✔️ Channel: Unnati Gyan Ka (@U.G.K2009) Microscope and telescope class 12, Optical instruments class 12 physics, Compound microscope theory, Astronomical telescope theory, Magnifying power microscope, Magnifying power telescope, Ray optics optical instruments, NEET physics microscope telescope, JEE physics optical instruments, NCERT optical instruments, Ray Optics Lecture 15, Unnati Gyan Ka Physics, @U.G.K2009, Ehsan Sir Physics, Ehsan Sir Teaching Since 2009, Boards 2026 Physics 🔥 Hashtags #Microscope #Telescope #OpticalInstruments #RayOptics #Class12Physics #NEET2026 #JEE2026 #UnnatiGyanKa #EhsanSir #PhysicsLecture