LuduminaWA-10 · WA-U3 · Planned
Radio production, absorption and selective interactions
Learning objectives
Explain oscillating circuits producing radio waves and induced oscillations on reception; compare wavelength-dependent material interactions.
8463 §§4.6.2.2–4.6.2.3 / 8464 §§6.6.2.2–6.6.2.3
DfE single-science pp.37–39 / Combined pp.32–33. Evidence checked 30 September–1 October 2026. Skills: WS1.2,1.4,3.5; MS4a.
Explanation
Oscillating electrical circuits can emit radio waves. When a receiving circuit absorbs a radio wave, it can develop electrical oscillations at the wave’s frequency. Material interactions depend on wavelength, so a route transparent to one band may absorb another.
Concepts, equations and units: AC frequency Hz; transmitter/receiver frequencies correspond; materials selectively absorb/transmit/reflect/refract; no antenna engineering formulas.
Prediction, demonstration and game exercise
Predict, observe, explain
Animate an oscillating circuit and receiving current at the same frequency; show model material response.
Planned learner game exercise
Tune transmitter/receiver frequency and choose a material route based on supplied response graphs.
Independent practice
Explain a reception failure and interpret two transmission/absorption curves.
Original practice example · Shared Higher
A radio wave of 2 MHz is received in the model circuit. What is the induced oscillation frequency?
Show working and model answer
Working / reasoning
The absorbing circuit’s oscillations correspond to the radio-wave frequency in this model.
Answer
2 MHz.
Exit check and success criteria
Frequency correspondence correct and explanation uses wavelength-dependent interaction evidence.
During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.
Misconceptions, practical links and mastery
Check these misconceptions
Radio waves transport current through empty space; all materials behave identically for every wavelength.
Practical preparation
Optional teacher demonstration/supplied circuit signals; not an RP.
Virtual preparation and revision only. Required hands-on activities and school records remain separate.
Proposed mastery
0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.