IB Physics C.3 Wave Phenomena | Concept Tutorial | GradePod (HL)

This is the Higher Level concept tutorial for C.3 Wave Phenomena in the current IB Physics syllabus. It covers everything in the SL tutorial first, then goes further into single slit diffraction, double slit intensity patterns, and diffraction gratings. If you've already watched the SL version, skip to 50:00 for the HL content. As you watch, tick off each learning objective on the free checklist on the GradePod page below. 👉 Free checklist + full topic page: https://www.gradepod.com/topics/c3-wave-phenomena It's a great way to track what you know and what still needs work. ━━━━━━━━━━━━━━━━━━━━━━━ WHAT'S COVERED IN THIS VIDEO ━━━━━━━━━━━━━━━━━━━━━━━ 0:00 Wavefronts vs ray diagrams 2:01 Reflection and the law of reflection (i = r) 4:19 Diffraction: gap size effects and when diffraction is maximum 11:00 Refraction: why waves bend and what changes at the boundary 16:30 Refractive index (n = c/v and Snell's law) 25:46 Total internal reflection and critical angle (sin c = 1/n) 30:00 Applications: optical fibres and endoscopes 37:47 Constructive and destructive interference: path difference and phase difference 42:00 Coherence: what it means and why it matters 46:55 Young's double slit experiment (s = λD/d) 50:00 Single slit diffraction intensity pattern (HL only) 54:00 Double slit intensity with single slit envelope (HL only) 56:30 Diffraction gratings: nλ = d sin θ and sharper maxima (HL only) ━━━━━━━━━━━━━━━━━━━━━━━ WANT TO GO FURTHER? ━━━━━━━━━━━━━━━━━━━━━━━ The GradePod Exam Pack gives you everything you need to turn what you've just learned into marks: ✓ Revision note template (build your own notes as you watch, I reference it throughout this video) ✓ Knowledge questions for C.3 Wave Phenomena ✓ Topic-by-topic past paper questions with full mark schemes ✓ Full mock exam, annotated data booklet and Paper 1B practice One-time purchase. £39. Instant download. Every topic included. 👉 Get the Exam Pack: https://www.gradepod.com/exam-pack ━━━━━━━━━━━━━━━━━━━━━━━ NEXT STEP ━━━━━━━━━━━━━━━━━━━━━━━ Once you've watched this video and ticked off your checklist, your next step is the past paper walkthrough. Watch me work through real IB exam questions on Wave Phenomena including the HL diffraction grating questions: 👉 C.3 Wave Phenomena HL Past Paper Video: https://www.youtube.com/watch?v=BYWSYnujSOE ━━━━━━━━━━━━━━━━━━━━━━━ ABOUT GRADEPOD ━━━━━━━━━━━━━━━━━━━━━━━ I'm Sally Weatherly, IB Physics teacher since 2004, Fellow of the Institute of Physics, and founder of GradePod. I built GradePod for the students I couldn't reach in the classroom. Every tutorial is free. No login, no catch. 👉 All 24 topics, free: https://www.gradepod.com/topics ━━━━━━━━━━━━━━━━━━━━━━━ #IBPhysics #IBPhysicsRevision #GradePod #IB #IB2025 #IBPhysicsHL #Waves #DiffractionGrating #SingleSlit #WavePhenomena