{"query": "The exposure value of a camera setting", "count": 20, "results": [{"id": "card_works_exposure", "title": "The exposure value of a camera setting", "shelf": "the-works", "surface": "secular", "snippet": "At f/8 and 1/250 s the exposure value is EV = log₂(N²/t) ≈ 13.97 — the single number that makes a bright beach and a dim room comparable.  Worked & sealed by the engine — EV = log₂(8² / 0.004) ≈ 13.97", "authority_tier": "verified", "source": "The Works — worked & sealed", "readable": false, "generated": false}, {"id": "card_theory_projective_geometry", "title": "Projective geometry (perspective & the cross-ratio)", "shelf": "theories", "surface": "secular", "snippet": "Projective geometry (perspective & the cross-ratio) — an engine domain that can touch it: geometry. Calibration: seals — a deterministic verifier can CONFIRM or BREAK checkable claims drawn from it, a", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (lone-domain seeding)", "readable": false, "generated": false}, {"id": "card_n_7b9fe7aaa620", "title": "Infrared — everything warm is broadcasting", "shelf": "science", "surface": "secular", "snippet": "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 — whi", "authority_tier": "engine_derived", "source": "Concordance assay — 2026-07-09", "readable": false, "generated": false}, {"id": "card_src_openstax_algebra_1_5_7_4_quantities_that_change_exponential_64d372ce", "title": "5.7.4 Quantities that Change Exponentially — Algebra 1", "shelf": "mathematics", "surface": "secular", "snippet": "5.7.4\n\nQuantities that Change Exponentially\n\n5.7.4 • Quantities that Change Exponentially\n\nCool Down\n\n1.\n\nThis graph represents one of the following descriptions. Which one?\n\na. A phone loses\nof its v", "authority_tier": "reference", "source": "OpenStax: Algebra 1 (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_book_33034", "title": "Premo Cameras, 1914 — Canadian Kodak Company", "shelf": "gutenberg", "surface": "secular", "snippet": "Premo Cameras, 1914, by Canadian Kodak Company. Subjects: Premo camera -- Catalogs; Cameras -- Catalogs. Read the full text (public domain): https://www.gutenberg.org/ebooks/33034", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "readable": true, "generated": false}, {"id": "card_src_word_cine_camera", "title": "cine-camera", "shelf": "dictionary", "surface": "secular", "snippet": "cine-camera: (noun) a camera that takes a sequence of photographs that can give the illusion of motion when viewed in rapid succession — syn: motion-picture camera, movie camera", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_movie_camera", "title": "movie camera", "shelf": "dictionary", "surface": "secular", "snippet": "movie camera: (noun) a camera that takes a sequence of photographs that can give the illusion of motion when viewed in rapid succession — syn: motion-picture camera, cine-camera", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_motion_picture_camera", "title": "motion-picture camera", "shelf": "dictionary", "surface": "secular", "snippet": "motion-picture camera: (noun) a camera that takes a sequence of photographs that can give the illusion of motion when viewed in rapid succession — syn: movie camera, cine-camera", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_television_camera", "title": "television camera", "shelf": "dictionary", "surface": "secular", "snippet": "television camera: (noun) television equipment consisting of a lens system that focuses an image on a photosensitive mosaic that is scanned by an electron beam — syn: tv camera, camera", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_tv_camera", "title": "tv camera", "shelf": "dictionary", "surface": "secular", "snippet": "tv camera: (noun) television equipment consisting of a lens system that focuses an image on a photosensitive mosaic that is scanned by an electron beam — syn: television camera, camera", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_etym_camera_lucida", "title": "camera lucida", "shelf": "etymology", "surface": "secular", "snippet": "camera lucida: etymology (Webster 1913) — [L. camera chamber + L. lucidus, lucida, lucid, light.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_camera_obscura", "title": "camera obscura", "shelf": "etymology", "surface": "secular", "snippet": "camera obscura: etymology (Webster 1913) — [LL. camera chamber + L. obscurus, obscura, dark.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_openstax_principles_managerial_accounting_problem_set_a_be022400", "title": "Problem Set A — Principles of Accounting, Volume 2: Managerial Accounting", "shelf": "economics", "surface": "secular", "snippet": "Problem Set A\n\nPA\n\n1.\n\nLO\n10.1Artisan Metalworks has a bottleneck in their production that occurs within the engraving department. Jamal Moore, the COO, is considering hiring an extra worker, whose sa", "authority_tier": "reference", "source": "OpenStax: Principles of Accounting, Volume 2: Managerial Accounting (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_principles_managerial_accounting_problem_set_b_1d688aee", "title": "Problem Set B — Principles of Accounting, Volume 2: Managerial Accounting", "shelf": "economics", "surface": "secular", "snippet": "Problem Set B\n\nPB\n\n1.\n\nLO\n10.1Variety Artisans has a bottleneck in their production that occurs within the engraving department. Arjun Naipul, the COO, is considering hiring an extra worker, whose sal", "authority_tier": "reference", "source": "OpenStax: Principles of Accounting, Volume 2: Managerial Accounting (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_pron_cameras", "title": "cameras", "shelf": "pronunciation", "surface": "secular", "snippet": "cameras: pronounced (ARPABET) K AE1 M ER0 AH0 Z; also K AE1 M R AH0 Z. From the CMU Pronouncing Dictionary — the standard machine-readable pronunciations of North American English.", "authority_tier": "reference", "source": "CMU Pronouncing Dictionary (cmudict) — BSD-2-Clause, Carnegie Mellon", "readable": false, "generated": false}, {"id": "card_src_etym_camera", "title": "camera", "shelf": "etymology", "surface": "secular", "snippet": "camera: etymology (Webster 1913) — n.: [L. vault, arch, LL., chamber. See Chamber.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_book_15975", "title": "Camera Obscura — Hildebrand", "shelf": "gutenberg", "surface": "secular", "snippet": "Camera Obscura, by Hildebrand (in nl). Subjects: Dutch literature. Read the full text (public domain): https://www.gutenberg.org/ebooks/15975", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "readable": true, "generated": false}, {"id": "card_src_pron_camera", "title": "camera", "shelf": "pronunciation", "surface": "secular", "snippet": "camera: pronounced (ARPABET) K AE1 M ER0 AH0; also K AE1 M R AH0. From the CMU Pronouncing Dictionary — the standard machine-readable pronunciations of North American English.", "authority_tier": "reference", "source": "CMU Pronouncing Dictionary (cmudict) — BSD-2-Clause, Carnegie Mellon", "readable": false, "generated": false}, {"id": "card_src_book_35709", "title": "Making Your Camera Pay — Frederick C. Davis", "shelf": "gutenberg", "surface": "secular", "snippet": "Making Your Camera Pay, by Frederick C. Davis. Subjects: Commercial photography. Read the full text (public domain): https://www.gutenberg.org/ebooks/35709", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "readable": true, "generated": false}, {"id": "card_src_book_68874", "title": "El la \"Camera obscura\" — Hildebrand", "shelf": "gutenberg", "surface": "secular", "snippet": "El la \"Camera obscura\", by Hildebrand (in eo). Subjects: Dutch fiction -- Translations into Esperanto. Read the full text (public domain): https://www.gutenberg.org/ebooks/68874", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "readable": true, "generated": false}], "house": {"door": "FIND", "kind": "cards", "trail": "results", "seal": null, "next_step": {"do": "open the top card", "door": "FIND", "tool": "card_get", "params": {"id": "card_works_exposure"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}