Ch9 Ray Optics Optical Instruments NEET MCQ PYQ Video 5

Ch9 Ray Optics Optical Instruments NEET MCQ, Class 12 Physics | Chapter 9: Ray Optics and Optical Instruments | NEET MCQ & PYQ | Hindi + English Medium Prepare for NEET 2026, 2027 with the most important Ray Optics and Optical Instruments MCQs and Previous Year Questions (PYQs). This mixed Hindi + English lecture covers all important concepts and exam-oriented questions based on the latest NCERT syllabus. 📚 Topics Covered: ✔ Reflection at Plane & Spherical Mirrors ✔ Refraction at Plane & Spherical Surfaces ✔ Mirror Formula & Lens Formula ✔ Total Internal Reflection (TIR) ✔ Critical Angle ✔ Prism & Deviation ✔ Thin Lens & Lens Maker's Formula ✔ Combination of Lenses ✔ Magnification ✔ Human Eye Defects & Corrections ✔ Simple Microscope ✔ Compound Microscope ✔ Astronomical Telescope ✔ NEET PYQs with Detailed Solutions This lecture is ideal for: • NEET 2026 & 2027 Aspirants • Class 12 CBSE Students • NCERT Revision • Physics MCQ Practice • Previous Year Question Practice • Board + NEET Preparation If this video helps you, please Like, Share, Subscribe, and press the 🔔 Bell Icon for more Physics lectures, MCQs, PYQs, and revision videos. Keywords: Ray Optics NEET, Optical Instruments NEET, Ray Optics MCQ, Ray Optics PYQ, Optical Instruments PYQ, Class 12 Physics Ray Optics, Reflection, Refraction, Total Internal Reflection, Prism, Lens Formula, Mirror Formula, Human Eye, Microscope, Telescope, NEET Physics, NCERT Physics, Hindi English Physics, Physics MCQs, NEET Preparation, Class 12 Physics Hashtags: #NEET #NEET2026 #Physics #RayOptics #OpticalInstruments #Class12Physics #NEETPhysics #MCQ #PYQ #NCERT #PhysicsMCQ #HindiEnglish #CBSE #MedicalEntrance #DYVPhysics Time stamps: 00:00 Q-1 A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the sun is 1.39 × 109 m and its mean distance from the earth is 1.5 × 1011 m. What is the diameter of the sun’s image on the paper? 01:02 Q-2 Two thin lenses of focal lengths f1 and f2 are in contact and coaxial Power of combination 01:35 Q-3 A lens having focal length f and aperture of diameter d forms image of intensity I. Aperture of diameter d/2 in central region of lens is covered by a black paper. Focal length of lens and intensity of image now will be respectively 03:46 Q-4 A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed, the point where the rays meet will move 5 cm closer to the lens. Focal length of lens is 04:43 Q-5 A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options describe best the image formed of an object of height 2 cm placed 30 cm from lens? 06:33 Q-6 A concave mirror of focal length f1 is placed at a distance of d from convex lens of focal length f2 . A beam of light coming from infinity and falling on this convex lens, concave mirror combination returns to infinity. The distance d must equal 07:08 Q-7 If biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of glass. This implies that liquid must have refractive index 08:14 Q-8 A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices and and R is radius of curvature of curved surface of lenses, then focal length of combination is 10:05 Q-9 Two identical glass = 3/2 equiconvex lenses of focal length f each are kept in contact. The space between the two lenses is filled with water = 4/3. Focal length of the combination is 12:01 Q-10 An equiconvex lens has power P. It is cut into two symmetrical halves by a plane containing the principal axis. Power of one part will be 12:34 Q-11 Two similar thin equiconvex lenses, of focal length f each, are kept coaxially in contact with each other such that the focal length of the combination is F1 . When the space between the two lenses is filled with glycerin which has same refractive index = 1.5 as that of glass) then the equivalent focal length is F2 . The ratio F1 : F2 will be