https://fire-safety.academy/w/index.php?action=history&feed=atom&title=File%3AFse-emissivity-v1.svg 2026-11-04T14:06:45Z Revision history for this page on the wiki MediaWiki 1.43.11 https://fire-safety.academy/w/index.php?title=File:Fse-emissivity-v1.svg&diff=1877&oldid=prev 2026-11-02T15:54:54Z

<p>Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity</p> <p><b>New page</b></p><div>== Summary ==<br /> Three surfaces at the same temperature. A black body (ε = 1) absorbs all incoming radiation and emits the most; a grey surface emits a fraction ε; a polished metal reflects most incoming radiation and emits little. Based on Van Rossum (2027), §5.4, and Tien et al. (2002), pp. 1-74–1-75.<br /> <br /> Original vector illustration for [[Emissivity]], level 2 Intermediate.<br /> <br /> * Source basis: Van Rossum (2027), §5.4 (black body absorbs all, reflects nothing, emits maximum; emissivity table: paint 0.9, polished aluminium 0.04); Tien et al. (2002), p. 1-74 (α + ρ + τ = 1) and p. 1-75 (Kirchhoff&#039;s law)<br /> * Alt text: Black body, painted surface and polished metal at one temperature: emission arrows shrink with emissivity; the metal reflects most radiation.<br /> <br /> == Licensing ==<br /> New drawing by Fire Safety Academy. © Fire Safety Academy.</div>

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