{"id": "card_floor_optics", "kind": "note", "title": "Optics — how light bends, focuses, and slows", "body": "Light is a Maxwell wave that slows in matter (v = c/n) and bends at boundaries (refraction); lenses focus it by the thin-lens equation; and a beam is also a stream of photons. Three pillars rest on Maxwell (light is electromagnetism) and quantum mechanics (the photon). The stick (stick_optics_how_light_bends_focuses_and_slows) seals a thin-lens image distance and the speed of light in glass (tools/seed_optics.py).", "source": {"label": "Narrow Highway — optics", "url": "", "authority_tier": "engine_derived", "ref": "stick_optics_how_light_bends_focuses_and_slows"}, "shelf": "codex", "box": "optics", "bands": ["floor", "optics", "light", "lenses", "refraction", "one map"], "subject": "Optics — how light bends, focuses, and slows", "connections": [{"to_card_id": "card_opt_refraction", "relationship": "has_part", "evidence": "a pillar of optics (Refraction)"}, {"to_card_id": "card_opt_lenses", "relationship": "has_part", "evidence": "a pillar of optics (Lenses)"}, {"to_card_id": "card_opt_the_photon", "relationship": "has_part", "evidence": "a pillar of optics (The photon)"}, {"to_card_id": "card_k_floor_of_discovery", "relationship": "part_of", "evidence": "the behaviour of light on the one map"}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "call": "codex.optics", "facets": {"subject": ["floor", "lenses", "light", "one map", "refraction"]}, "presentation": {"glyph": "•", "kind_label": "optics", "by": "Narrow Highway — optics", "authority": "engine_derived", "posted": "", "standing": ""}, "neighbors": [{"id": "card_opt_refraction", "title": "Refraction — light slows and bends", "relationship": "has part", "why": "a pillar of optics (Refraction)", "href": "/card/card_opt_refraction", "resolved": true}, {"id": "card_opt_lenses", "title": "Lenses — focusing by the thin-lens equation", "relationship": "has part", "why": "a pillar of optics (Lenses)", "href": "/card/card_opt_lenses", "resolved": true}, {"id": "card_opt_the_photon", "title": "The photon — optics is also quantum", "relationship": "has part", "why": "a pillar of optics (The photon)", "href": "/card/card_opt_the_photon", "resolved": true}, {"id": "card_k_floor_of_discovery", "title": "The Floor of Discovery — one floor, and by its design the fear of God", "relationship": "part of", "why": "the behaviour of light on the one map", "href": "/card/card_k_floor_of_discovery", "resolved": true}], "house": {"door": "FIND", "kind": "card", "trail": "connections", "seal": "/card/card_floor_optics", "next_step": {"do": "follow a connection: what this card rests on, and what rests on it", "door": "FIND", "tool": "card_connections", "params": {"id": "card_floor_optics"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}