Wave Optics One Shot Interference, Diffraction, Polarisation CBSE 12 & JEE Main скачать в хорошем качестве

Wave Optics One Shot Interference, Diffraction, Polarisation CBSE 12 & JEE Main

Wave Optics One Shot | CBSE Class 12 Physics + JEE Main By: Dr Kedar Pathak – “CBSE & JEE Physics | Dr Kedar Pathak” In this one‑shot video, we cover the complete Wave Optics chapter in a clear, systematic way using Beamer slides and step‑by‑step explanations. Perfect for Class 12 Board Exams and JEE Main revision. 🔹 What we cover in this session: From Ray Optics to Wave Optics – Limitations of ray optics – Wave nature of light, phase, wavelength – Huygens’ Principle & wavefronts Superposition & Interference – Superposition principle – Coherent sources – Path difference & phase difference – Conditions for constructive and destructive interference Young’s Double Slit Experiment (YDSE) – Experimental setup and geometry – Path difference at a general point – Bright and dark fringe conditions – Fringe width: (\beta = \dfrac{\lambda D}{d}) – Effect of changing ( \lambda, D, d ) and medium (refractive index) Numericals on Fringe Width – Typical board / JEE Main level example Interference in Thin Films (Qualitative) – Soap bubbles, oil films on water – Multiple reflections, effective path difference – Phase change on reflection (π shift at denser medium) Diffraction of Light – Concept of diffraction: bending around edges – Single‑slit diffraction setup – Condition for minima: ( a\sin\theta = n\lambda ) – Angular & linear width of central maximum Effect of Slit Width & Wavelength – How pattern changes with slit width (a), wavelength ( \lambda ), and screen distance (D) Resolving Power (Qualitative Idea) – Overlap of diffraction patterns – Role of aperture size in resolution Polarisation of Light – Unpolarised vs plane polarised light – Polariser & analyser, transmission axis – Simple visualisation of E‑field vibrations Malus’ Law – Setup with polariser + analyser – Malus’ law: ( I = I_0 \cos^2\theta ) – Important special cases & simple numericals Brewster’s Law (JEE Focus) – Brewster’s angle ( i_B ) – Geometry: reflected & refracted rays at (90^\circ) – Derivation of ( \tan i_B = \mu ) Wave Optics Formula Recap – All core formulas for boards + JEE Main on one slide How to Revise Wave Optics Efficiently – NCERT theory pass – Formula + diagram recap – NCERT examples + PYQ practice Final Summary – Key ideas: interference, diffraction, polarisation – How formulas follow logically from these concepts 📚 Best way to use this video: Watch once at normal speed to build concept ladder. Pause and re‑derive key formulas (YDSE, diffraction, Malus’ Law, Brewster’s Law). Solve NCERT + previous year questions immediately after. Use timestamps & formula recap slide for quick revision before exam. ✍️ Suitable for: CBSE Class 12 Physics (Wave Optics) JEE Main (Interference, Diffraction & Polarisation basics) Other state boards with similar syllabus If this step‑by‑step style helps you and you want full coverage of Physics (concept → practice → revision), subscribe to the channel and follow the complete playlist.