{"id": "card_n_7b9fe7aaa620", "kind": "note", "title": "Infrared — everything warm is broadcasting", "body": "Above visible red the spectrum becomes heat's own voice: every body radiates with a\npeak set by Wien's law, λ_peak·T = 2898 µm·K. Sealed: at body temperature (310 K) you glow\nbrightest at 9.3 µm — which is exactly where thermal cameras look: https://narrowhighway.com/s/2e10f3cd833c0da8ed1973eeb517c9de779e8956cd7d04eeee423aab280c4455 . Remote controls\n(~940 nm), night vision, and the greenhouse effect all live here — CO2 and water vapor absorb\nin these bands, which is honest empirical spectroscopy, measured line by line. The photon\npicture is arriving but gentle: an IR photon carries ~0.1 eV, enough to wiggle molecules\n(heat), far too weak to break them.", "source": {"label": "Concordance assay — 2026-07-09", "url": "https://narrowhighway.com/s/2e10f3cd833c0da8ed1973eeb517c9de779e8956cd7d04eeee423aab280c4455", "ref": "spectrum_walk_high", "authority_tier": "engine_derived"}, "shelf": "science", "box": "radio_spectrum", "bands": ["infrared", "wien's law", "thermal imaging", "9.3 microns", "heat radiation", "greenhouse", "remote control"], "connections": [], "author": "engine", "created_at": "2026-07-10T01:12:51.215332+00:00", "updated_at": "2026-07-10T01:12:51.215332+00:00", "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "metrics": {"paperclips_count": 0, "helpful_count": 0, "not_helpful_count": 0, "cite_count": 0, "walks_through_count": 0, "flagged_count": 0}, "source_hash": "9fdbe09390fbdcb9f5872cb03ba7d8fe1c611a72276afb413f9d157034f98c62"}