{"/e/electromagnetism-and-radiation/radiant-flux/": {"t": "Radiant flux", "s": "Radiant flux measures the rate of radiant energy flow."}, "/e/electromagnetism-and-radiation/radiation/": {"t": "Radiation", "s": "Energy emitted as waves or particles through space or matter."}, "/e/electromagnetism-and-radiation/radiometry/": {"t": "Radiometry", "s": "Techniques for measuring electromagnetic radiation power distribution."}, "https://codexery.com/geometry-and-shapes/e/geometry-and-shapes/solid-angle/": {"t": "Solid angle", "s": "A measure of the field of view an object covers from a point."}, "https://codexery.com/electromagnetism/e/electromagnetism/electromagnetic-radiation/": {"t": "Electromagnetic radiation", "s": "Self-propagating wave of the electromagnetic field carrying energy."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/neutrino/": {"t": "Neutrino", "s": "An elusive elementary particle that rarely interacts with matter."}, "https://codexery.com/units-measurement/e/units-and-measurement/international-system-of-units/": {"t": "International System of Units", "s": "The modern metric system used worldwide for measurement."}, "https://codexery.com/units-measurement/e/units-and-measurement/watt/": {"t": "Watt", "s": "SI unit of power, equal to one joule per second."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/frequency/": {"t": "Frequency", "s": "Frequency measures repeating events per unit time."}, "https://codexery.com/thermodynamics-and-statistical-mechanics/e/thermodynamics-and-statistical-mechanics/heat-transfer/": {"t": "Heat transfer", "s": "Discipline of thermal engineering concerning exchange of thermal energy."}, "https://codexery.com/optics-and-photonics/e/optics-and-photonics/intensity-physics/": {"t": "Intensity (physics)", "s": "Power transferred per unit area perpendicular to energy propagation.", "i": "https://codexery.com/optics-and-photonics/img/optics-and-photonics/intensity-physics.webp", "c": "Doraemonplus · CC BY-SA 4.0"}, "https://codexery.com/human-anatomy/e/human-anatomy/human-eye/": {"t": "Human eye", "s": "The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight."}, "https://codexery.com/optics-and-photonics/e/optics-and-photonics/luminance/": {"t": "Luminance", "s": "Photometric measure of luminous intensity per unit area in a given direction.", "i": "https://codexery.com/optics-and-photonics/img/optics-and-photonics/luminance.webp", "c": "Myself · Public domain"}, "https://codexery.com/relativity-and-gravitation/e/relativity-and-gravitation/invariant-physics/": {"t": "Invariant (physics)", "s": "An observable unchanged under a transformation."}, "https://codexery.com/units-measurement/e/units-and-measurement/joule/": {"t": "Joule", "s": "English physicist whose work led to the SI unit of energy."}, "https://codexery.com/meteorology/e/meteorology/hertz/": {"t": "Hertz", "s": "German physicist who proved electromagnetic waves exist."}, "https://codexery.com/astronomy-space/e/astronomy-and-space/luminosity/": {"t": "Luminosity", "s": "Absolute measure of radiated electromagnetic energy per unit time."}, "https://codexery.com/optics-and-photonics/e/optics-and-photonics/photometry-optics/": {"t": "Photometry (optics)", "s": "Branch of optics measuring light as perceived by the human eye."}, "/e/electromagnetism-and-radiation/ultraviolet/": {"t": "Ultraviolet", "s": "Electromagnetic radiation beyond violet, with both harmful and beneficial effects."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/particle/": {"t": "Particle", "s": "A particle is a separate part of a larger system."}, "https://codexery.com/chemistry-fundamentals/e/chemistry-fundamentals/chemical-bond/": {"t": "Chemical bond", "s": "The association of atoms or ions via electrostatic forces, electron sharing, or a combination, forming molecules and crystals."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/radioactive-decay/": {"t": "Radioactive decay", "s": "Unstable atomic nuclei lose energy by emitting radiation."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/gamma-ray/": {"t": "Gamma ray", "s": "Penetrating electromagnetic radiation from nuclear decay and cosmic events."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/positron/": {"t": "Positron", "s": "First antimatter particle, predicted by Dirac, discovered by Anderson."}, "https://codexery.com/science-measurement/e/science-and-measurement/radiography/": {"t": "Radiography", "s": "Imaging the unseen with X-rays and radiation."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/muon/": {"t": "Muon", "s": "A heavy electron that reshaped particle physics."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/meson/": {"t": "Meson", "s": "Unstable hadrons composed of a quark and an antiquark."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/neutron/": {"t": "Neutron", "s": "The neutron is a subatomic particle, symbol n or n⁰, that carries no electric charge and has a mass slightly larger than that of a proton."}, "https://codexery.com/astronomy/e/astronomy/cosmic-ray/": {"t": "Cosmic ray", "s": "High-energy particles from space, discovered via balloon flights in 1912.", "i": "https://codexery.com/astronomy/img/astronomy/cosmic-ray.webp", "c": "Vahram Mekhitarian · CC BY-SA 4.0"}, "https://codexery.com/electromagnetism/e/electromagnetism/electromagnetic-spectrum/": {"t": "Electromagnetic spectrum", "s": "The full range of electromagnetic radiation, from radio to gamma rays."}, "https://codexery.com/medical-emergencies/e/medical-emergencies/acute-radiation-syndrome/": {"t": "Acute radiation syndrome", "s": "Acute radiation syndrome results from high-dose ionizing radiation exposure."}, "https://codexery.com/world-war-ii-and-its-aftermath/e/world-war-ii-and-its-aftermath/atomic-bombings-of-hiroshima-and-nagasaki/": {"t": "Atomic bombings of Hiroshima and Nagasaki", "s": "First and only nuclear attacks in war, ending World War II.", "i": "https://codexery.com/world-war-ii-and-its-aftermath/img/world-war-ii-and-its-aftermath/atomic-bombings-of-hiroshima-and-nagasaki.webp", "c": "Government Printing Office · Public domain"}, "https://codexery.com/chernobyl/e/events/chernobyl-disaster/": {"t": "Chernobyl Disaster", "s": "The explosion of reactor 4 on 26 April 1986 and what followed."}, "https://codexery.com/nuclear-medicine-organizations/e/nuclear-medicine-organizations/international-commission-on-radiological-protection/": {"t": "International Commission on Radiological Protection", "s": "Independent body setting global radiological protection standards."}, "https://codexery.com/electromagnetism/e/electromagnetism/electromagnetic-field/": {"t": "Electromagnetic field", "s": "A physical field combining electric and magnetic influences."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/reflection-physics/": {"t": "Reflection (physics)", "s": "Wavefront returns into the original medium upon striking an interface."}, "https://codexery.com/derelict-landers/e/derelict-landers/viking-program/": {"t": "Viking program", "s": "Two American probes that landed on Mars in 1976."}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/stellar-structure/": {"t": "Stellar structure", "s": "Models describing internal star structure and energy transport."}, "https://codexery.com/astronomers-and-cosmologists/e/astronomers-and-cosmologists/johannes-kepler/": {"t": "Johannes Kepler", "s": "German polymath and father of modern astronomy", "i": "https://codexery.com/astronomers-and-cosmologists/img/astronomers-and-cosmologists/johannes-kepler.webp", "c": "via Wikipedia: Johannes Kepler · see source"}, "https://codexery.com/electromagnetism/e/electromagnetism/electric-field/": {"t": "Electric field", "s": "Electric fields arise from charges and exert forces on other charges."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/magnetic-field/": {"t": "Magnetic field", "s": "A vector field quantifying magnetic influence at a given location."}, "https://codexery.com/optics-and-color/e/optics-and-color/speed-of-light/": {"t": "Speed of light", "s": "Universal constant defining the maximum speed in spacetime."}, "https://codexery.com/electromagnetism/e/electromagnetism/electric-charge/": {"t": "Electric charge", "s": "Electric charge is a quantized property causing electromagnetic force."}, "https://codexery.com/classical-mechanics/e/classical-mechanics/velocity/": {"t": "Velocity", "s": "A vector measure of speed with direction."}, "https://codexery.com/mathematicians/e/mathematicians/henri-poincar/": {"t": "Henri Poincaré", "s": "French polymath and last universalist mathematician.", "i": "https://codexery.com/mathematicians/img/mathematicians/henri-poincar.webp", "c": "via Wikipedia: Henri Poincaré · see source"}, "https://codexery.com/historical-figures/e/notable/albert-einstein/": {"t": "Albert Einstein", "s": "Theoretical physicist who developed relativity and E=mc²"}, "https://codexery.com/relativity-and-spacetime/e/relativity-and-spacetime/mass-energy-equivalence/": {"t": "Mass–energy equivalence", "s": "Mass and energy are equivalent, related by the speed of light squared."}, "https://codexery.com/asteroids/e/asteroids/yarkovsky-effect/": {"t": "Yarkovsky effect", "s": "Thermal radiation force altering small asteroid orbits."}, "https://codexery.com/asteroids/e/asteroids/yorp-effect/": {"t": "YORP effect", "s": "Solar radiation torques alter asteroid spin and orientation over time."}, "https://codexery.com/crystallography/e/crystallography/absorption-electromagnetic-radiation/": {"t": "Absorption (electromagnetic radiation)", "s": "Matter takes up photon energy, transforming it into internal energy.", "i": "https://codexery.com/crystallography/img/crystallography/absorption-electromagnetic-radiation.webp", "c": "Own work · CC0"}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/scattering/": {"t": "Scattering", "s": "Physical processes where radiation or particles deflect from straight paths."}, "https://codexery.com/atmospheric-sciences/e/atmospheric-sciences/atmospheric-science/": {"t": "Atmospheric science", "s": "Study of Earth's atmosphere and its physical and chemical processes."}, "https://codexery.com/phantom-places-discovery/e/phantom-places-and-discovery/remote-sensing/": {"t": "Remote sensing", "s": "Acquiring information about objects without physical contact."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/polarization-waves/": {"t": "Polarization (waves)", "s": "Property of transverse waves specifying oscillation orientation."}, "https://codexery.com/metrology/e/metrology/mks-units/": {"t": "MKS units", "s": "Coherent measurement system that evolved into the International System of Units."}, "https://codexery.com/optics-and-photonics/e/optics-and-photonics/optical-depth/": {"t": "Optical depth", "s": "Dimensionless measure of radiant power attenuation through a material."}, "https://codexery.com/geometry-and-shapes/e/geometry-and-shapes/spherical-coordinate-system/": {"t": "Spherical coordinate system", "s": "A system using distance and two angles to locate points in space."}, "/e/electromagnetism-and-radiation/visible-spectrum/": {"t": "Visible spectrum", "s": "The range of electromagnetic radiation visible to the human eye."}, "https://codexery.com/astrophotography/e/astrophotography/radio-astronomy/": {"t": "Radio astronomy", "s": "Passive observation of celestial objects using radio waves.", "i": "https://codexery.com/astrophotography/img/astrophotography/radio-astronomy.webp", "c": "Maksym Kozlenko · CC BY-SA 4.0"}, "/e/electromagnetism-and-radiation/stimulated-emission/": {"t": "Stimulated emission", "s": "Predicted by Einstein; basis of laser and maser."}, "https://codexery.com/chemical-bonding-and-structure/e/chemical-bonding-and-structure/molecule/": {"t": "Molecule", "s": "Group of atoms bonded together; fundamental unit of chemical compounds."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/subatomic-particle/": {"t": "Subatomic particle", "s": "Particles smaller than atoms, studied in particle physics."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/quantum-electrodynamics/": {"t": "Quantum electrodynamics", "s": "Relativistic quantum field theory of light and matter interaction."}, "https://codexery.com/scientists-and-mathematicians/e/scientists-and-mathematicians/paul-dirac/": {"t": "Paul Dirac", "s": "Founder of quantum mechanics and formulator of the Dirac equation"}, "https://codexery.com/quantum-mechanics-and-foundations/e/quantum-mechanics-and-foundations/planck-constant/": {"t": "Planck constant", "s": "Fundamental constant linking energy and frequency in quantum mechanics."}, "https://codexery.com/optics-and-photonics/e/optics-and-photonics/phase-waves/": {"t": "Phase (waves)", "s": "Angle-like quantity representing the fraction of a cycle covered."}, "https://codexery.com/quantum-mechanics-and-foundations/e/quantum-mechanics-and-foundations/probability-amplitude/": {"t": "Probability amplitude", "s": "Complex number whose square modulus gives probability density."}, "/e/electromagnetism-and-radiation/vacuum-permittivity/": {"t": "Vacuum permittivity", "s": "Fundamental constant quantifying vacuum's response to electric fields."}, "https://codexery.com/materials-and-states-of-matter/e/materials-and-states-of-matter/semiconductor/": {"t": "Semiconductor", "s": "Materials with conductivity between conductors and insulators."}, "/e/electromagnetism-and-radiation/spontaneous-emission/": {"t": "Spontaneous emission", "s": "Spontaneous emission is the random decay of an excited quantum system emitting a photon."}, "https://codexery.com/optics-and-color/e/optics-and-color/fluorescence/": {"t": "Fluorescence", "s": "Emission of light from a substance after absorbing radiation."}, "https://codexery.com/radio-propagation/e/radio-propagation/doppler-effect/": {"t": "Doppler effect", "s": "Frequency shift due to relative motion between source and observer."}, "/e/electromagnetism-and-radiation/synchrotron/": {"t": "Synchrotron", "s": "Cyclic accelerator with synchronized magnetic field and particle energy."}, "https://codexery.com/black-holes/e/black-holes/black-hole/": {"t": "Black hole", "s": "An astronomical body from which nothing, not even light, can escape.", "i": "https://codexery.com/black-holes/img/black-holes/black-hole.webp", "c": "Event Horizon Telescope, uploader cropped and converted TIF to JPG · via Wikipedia: Black hole · CC BY 4.0"}, "https://codexery.com/relativity-and-gravitation/e/relativity-and-gravitation/geodesics-in-general-relativity/": {"t": "Geodesics in general relativity", "s": "Geodesics describe the paths of freely falling particles in curved spacetime."}, "https://codexery.com/black-holes/e/black-holes/photon-sphere/": {"t": "Photon sphere", "s": "Region of unstable circular photon orbits around a black hole."}, "https://codexery.com/radio-manufacturers/e/radio-manufacturers/general-electric/": {"t": "General Electric", "s": "American conglomerate formed from Edison and Thomson-Houston merger in 1892."}, "https://codexery.com/electromagnetism/e/electromagnetism/maxwell-s-equations/": {"t": "Maxwell's equations", "s": "Foundation of classical electromagnetism and optics."}, "https://codexery.com/electromagnetism/e/electromagnetism/lorentz-force/": {"t": "Lorentz force", "s": "Force on a charged particle by electric and magnetic fields."}, "https://codexery.com/astronomy/e/astronomy/crab-nebula/": {"t": "Crab Nebula", "s": "A supernova remnant and pulsar wind nebula in Taurus, linked to a supernova observed in AD 1054.", "i": "https://codexery.com/astronomy/img/astronomy/crab-nebula.webp", "c": "via Wikipedia: Crab Nebula · see source"}, "https://codexery.com/astronomy-space/e/astronomy-and-space/messier-87/": {"t": "Messier 87", "s": "A supergiant elliptical galaxy with a relativistic jet and supermassive black hole."}, "https://codexery.com/black-holes/e/black-holes/supermassive-black-hole/": {"t": "Supermassive black hole", "s": "Supermassive black holes anchor the centers of most large galaxies.", "i": "https://codexery.com/black-holes/img/black-holes/supermassive-black-hole.webp", "c": "Event Horizon Telescope · via Wikipedia: Supermassive black hole · CC BY 4.0"}, "https://codexery.com/supernova-remnants/e/supernova-remnants/pulsar-wind-nebula/": {"t": "Pulsar wind nebula", "s": "Nebula powered by a central pulsar's relativistic wind."}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/pulsar/": {"t": "Pulsar", "s": "Rotating neutron stars emitting regular electromagnetic pulses."}, "https://codexery.com/international-organizations-and-agreemen/e/international-organizations-and-agreements/international-telecommunication-union/": {"t": "International Telecommunication Union", "s": "Oldest UN agency, founded as International Telegraph Union in 1865."}, "https://codexery.com/radio-spectrum/e/radio-spectrum/microwave/": {"t": "Microwave", "s": "Electromagnetic radiation between radio waves and infrared, used widely in technology."}, "https://codexery.com/climate/e/climate/atmosphere-of-earth/": {"t": "Atmosphere of Earth", "s": "The gaseous envelope surrounding Earth, essential for life and climate."}, "https://codexery.com/electricity-and-magnetism/e/electricity-and-magnetism/insulator-electricity/": {"t": "Insulator (electricity)", "s": "Material that resists electric current flow."}, "https://codexery.com/manufacturing-and-materials/e/manufacturing-and-materials/masonry/": {"t": "Masonry", "s": "One of the oldest building crafts, using stone, brick, and mortar."}, "https://codexery.com/construction-materials/e/construction-and-materials/ceramic/": {"t": "Ceramic", "s": "Hard, brittle, heat-resistant materials made from fired inorganic substances.", "i": "https://codexery.com/construction-materials/img/construction-and-materials/ceramic.webp", "c": "Goterrestrial · CC BY 4.0"}, "https://codexery.com/meteorology/e/meteorology/fog/": {"t": "Fog", "s": "A low-lying cloud that shapes weather, travel, and even microbial life."}, "https://codexery.com/amateur-radio/e/amateur-radio/frequency-plan/": {"t": "Frequency plan", "s": "A band plan defines how a radio band is used and shared."}, "https://codexery.com/astrophotography/e/astrophotography/submillimetre-astronomy/": {"t": "Submillimetre astronomy", "s": "Submillimetre astronomy traces cold gas and dust across the universe.", "i": "https://codexery.com/astrophotography/img/astrophotography/submillimetre-astronomy.webp", "c": "ESO/ P. Horálek · CC BY 4.0"}, "https://codexery.com/cell-and-molecular-biology/e/cell-and-molecular-biology/tissue-biology/": {"t": "Tissue (biology)", "s": "Tissue is an assembly of similar cells with a specific function."}, "https://codexery.com/classical-mechanics/e/classical-mechanics/density/": {"t": "Density", "s": "Mass per unit volume, an intensive property of matter."}, "https://codexery.com/electricity-and-magnetism/e/electricity-and-magnetism/electromagnetism/": {"t": "Electromagnetism", "s": "One of four fundamental forces governing atomic and molecular interactions."}, "https://codexery.com/chemistry/e/chemistry/electronvolt/": {"t": "Electronvolt", "s": "Unit of energy gained by an electron through one volt."}, "https://codexery.com/chemistry-fundamentals/e/chemistry-fundamentals/chemical-reaction/": {"t": "Chemical reaction", "s": "Process rearranging atoms with energy change, yielding new substances.", "i": "https://codexery.com/chemistry-fundamentals/img/chemistry-fundamentals/chemical-reaction.webp", "c": "Д.Ильин : translation, optimization · CC0"}, "https://codexery.com/injuries-and-conditions/e/injuries-and-conditions/sunburn/": {"t": "Sunburn", "s": "A radiation burn from UV overexposure causing skin inflammation and damage.", "i": "https://codexery.com/injuries-and-conditions/img/injuries-and-conditions/sunburn.webp", "c": "Unknown author Unknown author or not provided · Public domain"}, "https://codexery.com/diseases-and-conditions/e/diseases-and-conditions/skin-cancer/": {"t": "Skin cancer", "s": "Most common cancer in humans, primarily caused by UV radiation."}, "https://codexery.com/atmosphere/e/atmosphere/atmosphere/": {"t": "Atmosphere", "s": "A layer of gases enveloping an astronomical object, retained by gravity."}, "https://codexery.com/sensory-systems/e/sensory-systems/lens-vertebrate-anatomy/": {"t": "Lens (vertebrate anatomy)", "s": "The crystalline lens: a transparent biconvex structure that refracts light and enables accommodation in land vertebrates."}, "https://codexery.com/sensory-systems/e/sensory-systems/cone-cell/": {"t": "Cone cell", "s": "Photoreceptor cells enabling color vision and fine detail."}, "https://codexery.com/cell-and-molecular-biology/e/cell-and-molecular-biology/photoreceptor-cell/": {"t": "Photoreceptor cell", "s": "Specialized retinal cells that convert light into biological signals.", "i": "https://codexery.com/cell-and-molecular-biology/img/cell-and-molecular-biology/photoreceptor-cell.webp", "c": "Tsukamoto Y and Omi N · CC BY 4.0"}, "https://codexery.com/sensory-systems/e/sensory-systems/retina/": {"t": "Retina", "s": "Innermost light-sensitive layer of the eye, part of the central nervous system."}, "https://codexery.com/battery-inventors/e/battery-inventors/johann-wilhelm-ritter/": {"t": "Johann Wilhelm Ritter", "s": "German Romantic scientist who discovered ultraviolet light and electroplating."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/infrared/": {"t": "Infrared", "s": "Invisible electromagnetic radiation between visible light and microwaves."}, "https://codexery.com/international-organizations-and-agreemen/e/international-organizations-and-agreements/international-organization-for-standardization/": {"t": "International Organization for Standardization", "s": "Independent developer of global technical and nontechnical standards."}, "https://codexery.com/sensory-systems/e/sensory-systems/visual-system/": {"t": "Visual system", "s": "Physiological basis of visual perception and light processing."}, "https://codexery.com/historical-figures/e/scientists/roger-bacon/": {"t": "Roger Bacon", "s": "Medieval English polymath and early advocate of empiricism"}, "https://codexery.com/historical-figures/e/notable/isaac-newton/": {"t": "Isaac Newton", "s": "English polymath who formulated laws of motion and universal gravitation."}, "https://codexery.com/nonfiction-and-reference/e/part-1/opticks/": {"t": "Opticks", "s": "Newton's experimental study of light, color, and diffraction."}, "https://codexery.com/languages/e/languages/latin/": {"t": "Latin", "s": "A classical language of the Italic branch, Latin evolved into the Romance languages and remained a key scholarly tongue into the early 19th century."}, "https://codexery.com/optics-and-color/e/optics-and-color/optics/": {"t": "Optics", "s": "Branch of physics studying light and electromagnetic radiation.", "i": "https://codexery.com/optics-and-color/img/optics-and-color/optics.webp", "c": "OpticalSystem · Public domain"}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/solar-system/": {"t": "Solar System", "s": "The Sun and all objects gravitationally bound to it.", "i": "https://codexery.com/planets-stellar-astronomy/img/planets-and-stellar-astronomy/solar-system.webp", "c": "via Wikipedia: Solar System · see source"}, "https://codexery.com/historical-figures/e/notable/isaac-asimov/": {"t": "Isaac Asimov", "s": "One of the 'Big Three' science fiction writers, author of the Foundation series."}, "https://codexery.com/astronomers-and-astrophysicists/e/astronomers-and-astrophysicists/william-herschel/": {"t": "William Herschel", "s": "Discoverer of Uranus and infrared radiation", "i": "https://codexery.com/astronomers-and-astrophysicists/img/astronomers-and-astrophysicists/william-herschel.webp", "c": "Lemuel Francis Abbott · via Wikipedia: William Herschel · Public domain"}, "https://codexery.com/engineering-disciplines/e/engineering-disciplines/radio-frequency-engineering/": {"t": "Radio-frequency engineering", "s": "Engineering of devices using radio-band signals."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/radio-wave/": {"t": "Radio wave", "s": "Electromagnetic waves with the longest wavelengths and lowest frequencies."}, "https://codexery.com/rf-connectors-and-coax/e/rf-connectors-and-coax/transmission-line/": {"t": "Transmission line", "s": "A structure designed to conduct electromagnetic waves with minimal reflections and losses.", "i": "https://codexery.com/rf-connectors-and-coax/img/rf-connectors-and-coax/transmission-line.webp", "c": "Thebezaliel · CC BY-SA 3.0"}, "https://codexery.com/energy-power/e/energy-and-power/microwave-oven/": {"t": "Microwave oven", "s": "An electric oven using microwaves for rapid food heating."}, "https://codexery.com/radio-propagation/e/radio-propagation/group-velocity/": {"t": "Group velocity", "s": "Velocity of the envelope of a wave packet."}, "https://codexery.com/electromagnetism/e/electromagnetism/dielectric/": {"t": "Dielectric", "s": "An electrical insulator that stores energy through polarisation."}, "https://codexery.com/radio-spectrum/e/radio-spectrum/extremely-high-frequency/": {"t": "Extremely high frequency", "s": "Millimeter waves enable dense frequency 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