RESEARCH BASE
Search 3,721 documents across 34 fields — every claim tier-rated by evidence
3,633 are the core, quality-scored corpus (34 lettered sections — see How We Work); the remaining 88 are cross-corpus synthesis documents (68 InterDocs, 12 Connections, 8 Theories) also indexed here.
45 results for "electromagnetic spectrum" — page 2 of 3
Q_2_03 — Cosmic Rays and High-Energy Astrophysics
Cosmic rays — high-energy particles from space, mostly protons and atomic nuclei — were discovered by Victor Hess in 1912 via balloon flights that measured ionization increasing with altitude, earning him the Nobel Prize
Q_3_20 — Exoplanet Atmospheres: Spectroscopy, Biosignatures & Habitability
The characterization of exoplanet atmospheres represents one of the most rapidly advancing frontiers in astrophysics, driven by the James Webb Space Telescope (JWST, launched December 25, 2021) and ground-based high-reso
G_4_27 — Schumann Resonance and Human Physiology: Evidence Assessment
The Schumann resonance — a global electromagnetic phenomenon at ~7.83 Hz fundamental and harmonics ~14.3, 20.8, 27.3, 33.8 Hz — is real, well-measured, and physically explained by lightning-driven oscillations in the Ear
G_1_03 — Remote Sensing Satellite Archaeology and Geophysics
Remote sensing and geophysical survey — the use of satellite imagery, airborne sensors, and ground-based electromagnetic instruments to detect buried or hidden archaeological features without excavation — has become one
G_1_16 — Ground-Penetrating Radar in Archaeological Prospection
Ground-Penetrating Radar (GPR) is a non-invasive geophysical survey technique that transmits short pulses of electromagnetic (radar) energy into the ground and records the reflections returned from subsurface interfaces
G_3_15 — Piezoelectric Effects: Crystals, Geology, and Ancient Technology
Piezoelectricity (from Greek piezein, "to squeeze") is the physical phenomenon whereby certain crystalline materials generate an electric charge when subjected to mechanical stress, and conversely, deform mechanically wh
G_3_26 — Resonance as Universal Information Encoding
Resonance — the selective amplification of energy at characteristic frequencies — appears across physical, biological, and cognitive systems as a substrate-independent information-encoding mechanism. From radio receivers
O_1_09 — Persinger's Tectonic Strain Theory and Geomagnetic Anomalies
Michael Persinger (1945–2018), a neuroscientist at Laurentian University (Sudbury, Ontario), developed the Tectonic Strain Theory (TST) — a hypothesis proposing that stress accumulating along geological fault zones produ
O_2_17 — Ball Lightning and Plasma Physics: Transient Luminous Phenomena
Ball lightning — a luminous, roughly spherical phenomenon occurring during or near thunderstorms, typically 10–50 cm in diameter, persisting for seconds to minutes, and sometimes reported to pass through solid barriers o
O_2_07 — Anomalous Animal Behavior Before Earthquakes and Storms
Reports of anomalous animal behavior preceding earthquakes and severe weather events span millennia and cultures: the earliest known written account dates to 373 BCE (Diodorus Siculus describing rats, weasels, snakes, an
D_5_17 — Torus Geometry in Ancient Architecture
The torus — a doughnut-shaped surface of revolution generated by rotating a circle around an axis coplanar with the circle — is one of the most fundamental geometries in nature, appearing in magnetic field lines, fluid d
S_4_10 — Space Elevators and Advanced Launch Technology
Space access remains the fundamental bottleneck for space development — current chemical rockets achieve orbit at $1,500–$5,000/kg to low Earth orbit (SpaceX Falcon 9, ~$2,700/kg; Starship aims for <$100/kg but is unprov
S_4_14 — Satellite Mega-Constellations: Starlink, Space Pollution, and Connectivity
Satellite mega-constellations — networks of hundreds to tens of thousands of small satellites in low Earth orbit (LEO) providing global broadband internet coverage — have moved from concept to reality, with SpaceX's Star
S_3_11 — Wireless Power and Energy Transmission
Wireless power transmission (WPT) transfers electrical energy without physical conductors using electromagnetic fields. Near-field (non-radiative): Inductive coupling — two coils in close proximity transfer power via osc
S_5_06 — Metamaterials and Programmable Matter
Metamaterials are engineered materials whose properties derive not from their chemical composition but from their physical structure — repeating sub-wavelength unit cells designed to interact with electromagnetic, acoust
F_4_27 — Hunter-Gatherer Societies: Lifeways, Ecology, and the Transition to Agriculture
For over 95% of Homo sapiens history, all humans lived as hunter-gatherers — mobile foragers whose subsistence depended on wild plants, animals, and aquatic resources. Modern ethnographic and archaeological evidence has
ZA_1_09 — Casimir Effect and Vacuum Energy Forces
The Casimir effect, predicted by Dutch physicist Hendrik Casimir in 1948 and experimentally confirmed with increasing precision since the late 1990s, is one of the most remarkable demonstrations that the quantum vacuum i
ZA_4_08 — Photon Physics and the Nature of Light
The photon — the quantum of the electromagnetic field — is simultaneously one of the most familiar and most enigmatic particles in physics. Planck's introduction of energy quanta (E = hf, 1900) and Einstein's explanation
ZA_4_26 — Luminiferous Aether: The Medium That Wasn't, and the Physics It Created
Luminiferous aether — from the Latin lumen (light) and Greek aithēr (upper sky) — was the hypothetical medium through which light was thought to propagate. Just as sound requires air, 19th-century physics held that light
ZA_3_12 — Lattice Gauge Theory and Non-Perturbative QCD
Lattice gauge theory — the formulation of quantum field theories on a discrete spacetime lattice rather than in continuous spacetime — is the only known first-principles method for making non-perturbative calculations in
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