Reflection and Refraction: Why Light Bends | GCSE Physics

What happens when a wave meets a boundary, animated: reflection, transmission, refraction and absorption, ray diagrams with the normal, the law of reflection, refraction in a glass block (towards the normal when light slows, away when it speeds up), why the frequency stays the same while the wavelength changes, the wavefront explanation (Higher), and total internal reflection and the critical angle (Edexcel separate Physics). Finishes with an exam-style question worked line by line. Covers: AQA 4.6.1.3, 4.6.2.2 · Edexcel Topics 4 & 5 · OCR Gateway P5.1, P5.3 (refraction for Combined and separate Physics; reflection diagrams and TIR for separate Physics; speed and wavefront explanations for Higher tier). 0:00 Intro 0:08 Hook 0:32 At a boundary 1:14 Reflection 1:51 Refraction in a glass block 2:43 Why it bends: speed 3:26 Wavefronts 4:05 Total internal reflection 5:12 Worked example 6:11 Summary Narrated with an AI voice. Worked Example is not affiliated with or endorsed by AQA, OCR or Pearson Edexcel. Exam board names are used only to show which specifications a video covers.