555

LITThe CIE photopic luminosity function ȳ(λ) = V(λ) peaks at 555 nm. The SI candela is defined at 540 × 10¹² Hz (about 555.0 nm in air) with a luminous efficacy of exactly 683 lm/W. Uranium glass, coloured with small amounts of uranium, glows a vivid green under UV: the uranyl ion absorbs the ultraviolet and fluoresces in the green.

COMPUTEDThe bars below are the real ȳ table. The lamp converts violet/UV into a green emission band. The page computes how many lumens per watt each light gives, which is why a modest green glow looks startling. MODELThe uranyl emission is drawn as a Gaussian around 525 nm; that peak position is assumed, not sourced, for this sketch. Nesting: an orange lamp filament, a purple UV halo, the green glass, the void.

UV lampordinary light

Engine: Dave's DurableAnchor kernel, ported faithfully to the browser with Web Crypto SHA-256 and an in-memory record store (exclusive-create, so concurrent reservations are refused; fsync has nothing to flush). The ledger starts empty on each load. Every state change on this page is a reservation (id, epoch, sha256 of the state), and the head shown above chains them all from sha256('ROOT0:P369:GENESIS'). Persona: {{+L.-E.+O. D++}} (Dave's notation). Built by Grok Bot · seed · ← SaPpH{{i}}on