{"query": "FM broadcast (VHF) — three-meter waves, line of sight", "count": 20, "results": [{"id": "card_n_a7ae37960cae", "title": "FM broadcast (VHF) — three-meter waves, line of sight", "shelf": "science", "surface": "secular", "snippet": "88–108 MHz; sealed: the 100 MHz wave is 2.99 m, and its quarter-wave whip is 74 cm —\nthe length of a car antenna, derived: https://narrowhighway.com/s/d6211f4efb2518c6de145decf57f27b131a01c24ce7841853"}, {"id": "card_c_9610a78874eb", "title": "The radio horizon — why towers are tall ↔ FM broadcast (VHF) — three-meter waves, line", "shelf": "connections", "surface": null, "snippet": "Every VHF/FM/TV coverage map is this square root wearing terrain.  — a concord the card itself states; mined + verified."}, {"id": "card_c_9e441e079649", "title": "FM broadcast (VHF) — three-meter waves, line ↔ AM broadcast (medium wave) — where the dial ", "shelf": "connections", "surface": null, "snippet": "Frequency modulation carries the signal in the wave's TIMING rather than its height, which is why amplitude noise (lightning, ignition) mostly washes out — the static-resistance is structural, not mag"}, {"id": "card_c_3eab92dc34f4", "title": "The radio spectrum — one law from the cavity ↔ FM broadcast (VHF) — three-meter waves, line", "shelf": "connections", "surface": null, "snippet": "FM's 2.99 m wave and its 74 cm quarter-wave whip  — a concord the card itself states; mined + verified."}, {"id": "card_n_9ab6ee5e792c", "title": "The radio horizon — why towers are tall", "shelf": "science", "surface": "secular", "snippet": "Pure geometry, sealed: from height h the horizon lies at √(2hR) — a 100 m tower\nreaches 35,695 m ≈ 35.7 km: https://narrowhighway.com/s/d6211f4efb2518c6de145decf57f27b131a01c24ce7841853f395b7bc986c323"}, {"id": "card_c_feb938352b59", "title": "FM broadcast (VHF) — three-meter waves, line ↔ The radio spectrum — one law from the cavity", "shelf": "connections", "surface": null, "snippet": "88–108 MHz; sealed: the 100 MHz wave is 2.99 m, and its quarter-wave whip is 74 cm — the length of a car antenna, derived: https://narrowhighway.com/s/d6211f4efb2518c6de145decf57f27b131a01c24ce7841853"}, {"id": "card_src_word_line_of_sight", "title": "line of sight", "shelf": "dictionary", "surface": "secular", "snippet": "line of sight: (noun) an imaginary straight line along which an observer looks — syn: line of vision"}, {"id": "card_src_word_electric_meter", "title": "electric meter", "shelf": "dictionary", "surface": "secular", "snippet": "electric meter: (noun) a meter for measuring the amount of electric power used — syn: power meter"}, {"id": "card_src_word_power_meter", "title": "power meter", "shelf": "dictionary", "surface": "secular", "snippet": "power meter: (noun) a meter for measuring the amount of electric power used — syn: electric meter"}, {"id": "card_src_word_meter", "title": "meter", "shelf": "dictionary", "surface": "secular", "snippet": "meter: (noun) the basic unit of length adopted under the Systeme International d'Unites (approximately 1.094 yards) — syn: metre, m · (noun) any of various measuring instruments for measuring a quanti"}, {"id": "card_src_word_telescope_sight", "title": "telescope sight", "shelf": "dictionary", "surface": "secular", "snippet": "telescope sight: (noun) gunsight consisting of a telescope on a firearm for use as a sight — syn: telescopic sight"}, {"id": "card_src_word_telescopic_sight", "title": "telescopic sight", "shelf": "dictionary", "surface": "secular", "snippet": "telescopic sight: (noun) gunsight consisting of a telescope on a firearm for use as a sight — syn: telescope sight"}, {"id": "card_src_word_common_meter", "title": "common meter", "shelf": "dictionary", "surface": "secular", "snippet": "common meter: (noun) the usual (iambic) meter of a ballad — syn: common measure"}, {"id": "card_src_word_water_meter", "title": "water meter", "shelf": "dictionary", "surface": "secular", "snippet": "water meter: (noun) meter for measuring the quantity of water passing through a particular outlet"}, {"id": "card_src_word_exposure_meter", "title": "exposure meter", "shelf": "dictionary", "surface": "secular", "snippet": "exposure meter: (noun) photographic equipment that measures the intensity of light — syn: light meter, photometer"}, {"id": "card_src_word_light_meter", "title": "light meter", "shelf": "dictionary", "surface": "secular", "snippet": "light meter: (noun) photographic equipment that measures the intensity of light — syn: exposure meter, photometer"}, {"id": "card_src_word_gas_meter", "title": "gas meter", "shelf": "dictionary", "surface": "secular", "snippet": "gas meter: (noun) a meter for measuring the amount of gas flowing through a particular pipe — syn: gasometer"}, {"id": "card_src_word_kilogram_meter", "title": "kilogram-meter", "shelf": "dictionary", "surface": "secular", "snippet": "kilogram-meter: (noun) a unit of work equal to the work done by a one kilogram force operating through a distance of one meter"}, {"id": "card_src_word_postage_meter", "title": "postage meter", "shelf": "dictionary", "surface": "secular", "snippet": "postage meter: (noun) meter for bulk mailings that imprints correct prepaid postage on pieces of mail and records the total charge"}, {"id": "card_src_word_line_of_vision", "title": "line of vision", "shelf": "dictionary", "surface": "secular", "snippet": "line of vision: (noun) an imaginary straight line along which an observer looks — syn: line of sight"}]}