IGCSE Physics: The Wave Equation & Frequency-Period Relationship | Edexcel Modular | Unit 5 | L2

This lesson covers spec points 5.5 and 5.6 — using v = fλ and f = 1/T, including unit conversions between Hz, kHz and MHz.

PowerPoint includes:
• Retrieval starter reviewing wave properties from L1
• Direct Instruction (I Do) — v = fλ and T = 1/f introduced with formula triangles; unit conversions for kHz and MHz; two fully worked examples
• Guided Practice (We Do) — three scaffolded calculations: finding speed, finding frequency, and linking period to speed
• Independent Practice (You Do) — multi-step exam-style calculations including MHz and period conversion problems
• Logical steps ordering activity for unit conversion problems
• Review and Reflect exit ticket on frequency-period mastery

Activity Sheet includes:
• Formulae box showing v = fλ and T = 1/f (base formulae only)
• 11 exam-style questions of increasing difficulty
• Questions covering Hz/kHz/MHz conversion, finding speed/frequency/wavelength, and multi-step problems
• Stretch question involving ms unit conversion and wave type identification
• Full mark scheme with full working for teacher use