0–3 puzzle: Present the empty-gap sign, invite a no-equipment prediction. 3–7 source: Identify emitting panel, evacuated gap and receiving surface as a fictional system, not real apparatus. 7–12 teach: Thermal radiation crosses the gap as electromagnetic radiation; conduction and convection cannot use the empty gap because they require matter there. Use three-paths, then ask what fraction is absorbed (not given). 12–20 route: Learners build a labelled path or explain it aloud, with a correction to no way. 20–23 audit: Reject “radiation needs air” and “all emitted energy arrives”. 23–25 exit: Name the possible pathway and one unknown.
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Day 4 · An evacuated gap is not an energy wallYear 11 Physics · T1 W1–2 · Day 4 lesson
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Year 11 / Physics / Term 1 / Weeks 01 02
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