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optical fiber or waveguide, a radiation mode or unbound mode is a mode which is not confined by the fiber core. Such a mode has fields that are transversely
Radiation_mode
Trace radiation from the early universe
The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard
Cosmic_microwave_background
Electromagnetic wave with oscillations perpendicular to the direction of travel
A transverse mode of electromagnetic radiation is a particular electromagnetic field pattern of the radiation in the plane perpendicular (i.e., transverse)
Transverse_mode
Missile designed to detect and home on an enemy radio emission source
the source of radiation. Jammers also led to the addition of a home-on-jam feature to missiles that usually use a different targeting mode (e.g. active
Anti-radiation_missile
Thermal electromagnetic radiation
Black-body radiation is the thermal electromagnetic radiation emitted from a body in thermodynamic equilibrium with its environment. A black body is an
Black-body_radiation
Hypothetical astrophysical effect
Hawking radiation is radiation released outside a black hole's event horizon due to quantum effects according to a model developed by Stephen Hawking in
Hawking_radiation
Radiotherapy machine involved in six accidents
The Therac-25 was a computer-controlled radiation therapy machine produced by Atomic Energy of Canada Limited (AECL) in 1982 after the Therac-6 (neptune)
Therac-25
Nuclear artillery
from 100 tons of TNT (420 GJ) up to 1.1 kt (4.6 TJ) and an enhanced-radiation mode which could be turned on or off The Mod 1 was fission-only with a fixed
W79 Artillery-Fired Atomic Projectile
W79_Artillery-Fired_Atomic_Projectile
Ionizing radiation
A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay
Beta_particle
Spectral density of light emitted by a black body
In physics, Planck's law (also Planck radiation law) describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium
Planck's_law
Zone of energetic charged particles around the planet Earth
The Van Allen radiation belt is a zone of energetic charged particles, most of which originate from solar wind, that are captured and held around a planet
Van_Allen_radiation_belt
Physical model of propagating energy
In physics, electromagnetic radiation (EMR) or an electromagnetic wave (EMW) is a self-propagating wave of the electromagnetic field that carries momentum
Electromagnetic_radiation
Computational electrodynamics technique
and an infinite number of radiation modes (which carry optical power away from the waveguide). The guided and radiation modes together form a complete
Eigenmode_expansion
Device that emits light via optical amplification
wavelength in a vacuum. Most "single wavelength" lasers produce radiation in several modes with slightly different wavelengths. Although temporal coherence
Laser
U.S. high-speed air-to-surface anti-radiation missile
The AGM-88 HARM (High-speed Anti-Radiation Missile) is a tactical, air-to-surface anti-radiation missile designed to home in on electronic transmissions
AGM-88_HARM
Emissions from unstable atomic nuclei
disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three
Radioactive_decay
Measure of ionizing radiation in the environment
Background radiation is a measure of the level of ionizing radiation present in the environment at a particular location which is not due to deliberate
Background_radiation
Penetrating form of electromagnetic radiation
A gamma ray, also known as gamma radiation (symbol γ), is a penetrating form of electromagnetic radiation arising from high-energy interactions like the
Gamma_ray
Electromagnetic radiation generated by the thermal motion of particles
Thermal radiation is electromagnetic radiation emitted by the thermal motion of particles in matter. All matter with a temperature greater than absolute
Thermal_radiation
E and B modes (Polarisation)
microwave region of the radio spectrum. E and B modes are two types of polarization patterns of radiation observed in sky. The launch of the IXPE telescope
Polarization_(cosmology)
Form of electromagnetic radiation
Infrared radiation (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter
Infrared
Technique in quantum optics
state of a radiation mode that contains a single excitation. This type of state is completely delocalized.[citation needed] Single radiation modes are labelled
Single-photon_source
Set of two dipole antennas
axial mode the antenna radiates circularly polarized radiation along its axis. Specialized normal mode turnstile antennas called superturnstile or batwing
Turnstile_antenna
Full range of electromagnetic radiation frequencies
The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate
Electromagnetic_spectrum
Increase in taxonomic diversity or morphological disparity
An evolutionary radiation is an increase in taxonomic diversity that is caused by elevated rates of speciation, that may or may not be associated with
Evolutionary_radiation
Resistance against ionizing radiation of electronics
malfunction caused by high levels of ionizing radiation (particle radiation and high-energy electromagnetic radiation), especially for environments in outer
Radiation_hardening
Antenna with conducting wires in a helix
quadrifilar implementations, broadside circularly polarized radiation can be realized. In the axial mode or end-fire helical antenna, the diameter and pitch of
Helical_antenna
Laboratory radiation length radiation mode radiation oncologist radiation pattern radiation poisoning (radiation sickness) radiation pressure radiation protection
Index_of_radiation_articles
Theory of rapid universe expansion
of the so-called "B-modes" of the polarization of the background radiation could provide evidence of the gravitational radiation produced by inflation
Cosmic_inflation
Branch of physics
described by a single optical cavity mode coupled to a single mechanical mode. The coupling originates from the radiation pressure of the light field that
Cavity_optomechanics
Intentional defect in the ground strip of a printed circuit board
should not influence or disturb the main resonance, i.e. the primary radiation mode. That work indeed introduced a non-resonant DGS and proved the concept
Defected_ground_structure
Range 300-3000 GHz of the electromagnetic spectrum
nanowatts of coherent terahertz radiation using a semiconductor source. THz radiation was generated by nonlinear mixing of two modes in a mid-infrared quantum
Terahertz_radiation
Monochrome light beam whose amplitude envelope is a Gaussian function
In optics, a Gaussian beam is an idealized beam of electromagnetic radiation whose amplitude envelope in the transverse plane is given by a Gaussian function;
Gaussian_beam
Type of angular momentum in light
whose symmetry is such that in the course of the exciton relaxing, a radiation mode of non-zero topological charge is created directly. Most recently, the
Orbital angular momentum of light
Orbital_angular_momentum_of_light
Gas-filled radiation detector
feedback in radiation survey and contamination checks. As the ion chamber works in current mode, not pulse mode, this is synthesised from the radiation rate
Ionization_chamber
Process in which organisms diversify rapidly from an ancestral species
In evolutionary biology, adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into a multitude of new forms
Adaptive_radiation
Problematic appearance of quantities beyond the Planck scale
In black hole physics, the original derivation of Hawking radiation involved field modes that, near the black hole horizon, have arbitrarily high frequencies—in
Trans-Planckian_problem
fiber, the effective mode volume is the square of the product of the diameter of the near-field pattern and the sine of the radiation angle of the far-field
Effective_mode_volume
Spin states of hydrogen
converts into parahydrogen. This process lacks any natural de-excitation radiation mode, so it is slow in the absence of a catalyst which can facilitate interconversion
Spin_isomers_of_hydrogen
Pattern of oscillating motion in a system
A normal mode of a dynamical system is a pattern of motion in which all parts of the system move sinusoidally with the same frequency and with a fixed
Normal_mode
Device that emites acoustic radiation
Sound amplification by stimulated emission of radiation (SASER) refers to a device that emits acoustic radiation. It focuses sound waves in a way that they
Sound amplification by stimulated emission of radiation
Sound_amplification_by_stimulated_emission_of_radiation
NASA satellite climate data instruments
Observing System (EOS), designed to measure solar-reflected and Earth-emitted radiation from the top of the atmosphere (TOA) to the Earth's surface. Cloud properties
Clouds and the Earth's Radiant Energy System
Clouds_and_the_Earth's_Radiant_Energy_System
Hollow metal pipe used to carry radio waves
supported modes, (g) in which there is no radiation field, and (h) in which discontinuities and bends may cause mode conversion but not radiation.[citation
Waveguide_(radio_frequency)
Electromagnetic radiation with wavelengths from 1 m to 1 mm
Microwave is a form of electromagnetic radiation with wavelengths shorter than other radio waves but longer than infrared waves. Its wavelength ranges
Microwave
Quantum effect of uncertainty
{\displaystyle n} photons in radiation mode | n ⟩ {\displaystyle |n\rangle } . The dynamic only considers neighboring modes | n + 1 ⟩ {\displaystyle |n+1\rangle
Quantum_noise
Curve whose curvature changes linearly
curvature and suppress coupling to radiation modes, or in multimode waveguides, in order to suppress coupling to higher order modes and ensure effective singlemode
Euler_spiral
Idealised cavity in radiative equilibrium
In radiation thermodynamics, a Hohlraum (German: [ˈhoːlˌʁaʊ̯m] ; a non-specific German word for a "hollow space", "empty room", or "cavity") is a cavity
Hohlraum
Phase space used in quantum optics
{a}}^{\dagger }{\widehat {a}}} is the number operator of the considered radiation mode. The important relationship U ^ ( θ ) † a ^ U ^ ( θ ) = a ^ e − i θ
Optical_phase_space
Effects of ionizing radiation
Radiation damage is the effect of ionizing radiation on physical objects including non-living structural materials. It can be either detrimental or beneficial
Radiation_damage
Aspect of public health
Electromagnetic radiation can be classified into two types: ionizing radiation and non-ionizing radiation, based on the capability of a single photon
Electromagnetic radiation and health
Electromagnetic_radiation_and_health
1986 nuclear accident in the Soviet Union
causes mostly unrelated to radiation exposure. It is the only instance in commercial nuclear power history where radiation-related fatalities occurred
Chernobyl_disaster
Type of field-effect transistor
In an enhancement mode MOSFET, voltage applied to the gate terminal increases the conductivity of the device. In depletion mode transistors, voltage
MOSFET
Classical physics prediction that black body radiation grows unbounded with frequency
Rayleigh-Jeans law is an approximation to the spectral radiance of electromagnetic radiation as a function of wavelength from a black body at a given temperature through
Ultraviolet_catastrophe
use other formulations such as energy modes, radiation modes, stored energy modes or radiation efficiency modes. Garbacz, R.J. (1965). "Modal expansions
Characteristic_mode_analysis
society. He also suggests that the audience reduce and control cell phone radiation and ensure that technology does not threaten the lives of all the living
List of films with post-credits scenes (2010s)
List_of_films_with_post-credits_scenes_(2010s)
Converts light into current
semiconductor diode sensitive to photon radiation, such as visible light, infrared or ultraviolet radiation, X-rays and gamma rays. It produces an electrical
Photodiode
Structure that guides waves efficiently
microwave radar feasible. The most important centre of US research was at the Radiation Laboratory (Rad Lab) at MIT but many others took part in the US, and in
Waveguide
although they do not both correspond to same modes in the following sense: In the absence of radiation reaction and viscosity, the Maclaurin spheroid
Chandrasekhar–Friedman–Schutz instability
Chandrasekhar–Friedman–Schutz_instability
field, achieving a maximum coupling to the radiation when the frequency of the radiation equals a vibrational mode of the dipole. When this happens, the absorption
Absorption_edge
Aspect of relativity in physics
waves transport energy as gravitational radiation, a form of radiant energy similar to electromagnetic radiation. Newton's law of universal gravitation
Gravitational_wave
Kinematic prediction of quantum field theory for an accelerating observer
existence of Unruh radiation could be linked to this apparent event horizon, putting it in the same conceptual framework as Hawking radiation. On the other
Unruh_effect
Power supply with switching regulator
A switched-mode power supply (SMPS), also called switching-mode power supply, switch-mode power supply, switched power supply, or simply switcher, is an
Switched-mode_power_supply
Way to produce very short laser bursts
Mode locking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds
Mode_locking
British air-launched anti-radiation missile
ALARM (Air Launched Anti-Radiation Missile) is a British anti-radiation missile designed primarily to destroy enemy radars for the purpose of Suppression
ALARM
Type of radioactive decay
a radiation overexposure?" [2] Archived 2007-10-19 at the Wayback Machine Alpha emitters by increasing energy (Appendix 1) These other decay modes, while
Alpha_decay
Color
color of the universe (derived from a sampling of the electromagnetic radiation from 200,000 galaxies), given by a team of astronomers from Johns Hopkins
Beige
Production of an image when X-rays strike a fluorescent screen
both of these imaging mode families, the information conveyed by the variable attenuation of invisible electromagnetic radiation as it passes through tissues
Fluoroscopy
Neutron embrittlement, sometimes more broadly radiation embrittlement, is the embrittlement of various materials due to the action of neutrons. This is
Neutron_embrittlement
signal – Queuing delay Race hazard – Radar – Radiation angle – Radiation mode – Radiation pattern – Radiation resistance – Radiator – Radio beam – Radio
Index_of_electronics_articles
Period of major evolutionary diversification of animal life
The Cambrian explosion (also known as the Cambrian radiation or Cambrian diversification) is an interval of time beginning approximately 538.8 million
Cambrian_explosion
Electronic sensor that measures infrared light
absolute zero emit heat energy in the form of electromagnetic radiation. Usually this radiation isn't visible to the human eye because it radiates at infrared
Passive_infrared_sensor
Effective theory of gravity
potential modes and long range radiation modes of an effective field for a composite object with a size r {\displaystyle r} . The radiation from this
Non-relativistic general relativity
Non-relativistic_general_relativity
Type of electromagnetic radiation
waves (formerly called Hertzian waves) are a type of electromagnetic radiation with the lowest frequencies and the longest wavelengths in the electromagnetic
Radio_wave
Sensor that detects nearby objects
sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return
Proximity_sensor
2008 ROM hack of EarthBound
is the same as the original EarthBound Also known as the Radiation Halloween Hack, Radiation's Halloween Hack, or Press the B Button Kaharl, Jonathan (August
EarthBound_Halloween_Hack
English theoretical physicist (1942–2018)
theoretical prediction that black holes emit radiation, often called Hawking radiation. Initially, Hawking radiation was controversial. By the late 1970s, and
Stephen_Hawking
Type of radiation therapy
Brachytherapy is a form of radiation therapy where a sealed radiation source is placed inside or next to the area requiring treatment. The word "brachytherapy"
Brachytherapy
Elementary particle or quantum of light
of black-body radiation from a relatively simple assumption. He decomposed the electromagnetic field in a cavity into its Fourier modes, and assumed that
Photon
Isotope of actinium
cross sections for 78-192 MeV protons incident on 232Th targets". Applied Radiation and Isotopes. 118: 366–374. Bibcode:2016AppRI.118..366G. doi:10.1016/j
Actinium-225
Equipment for electromagnetic testing
electromagnetic reverberation chamber (also known as a reverb chamber (RVC) or mode-stirred chamber (MSC)) is an environment for electromagnetic compatibility
Electromagnetic reverberation chamber
Electromagnetic_reverberation_chamber
Light-conducting fiber
or transverse modes are called multi-mode fibers, while those that support a single mode are called single-mode fibers (SMF). Multi-mode fibers generally
Optical_fiber
Setting on phones and pagers
Silent mode is a setting available on mobile phones and pagers that, when activated, disables the ringtones and, in some cases, also the vibrating alerts
Silent_mode
Waveguide formed by posts inserted in a dielectric substrate
specific traveling mode, the leakages decrease with the increasing frequency and are maximal at the cut-off frequency of the mode. The radiation leakage factor
Substrate-integrated waveguide
Substrate-integrated_waveguide
Loudspeaker technology
Distributed Mode Loudspeaker (DML) is a flat-panel loudspeaker technology, developed by NXT, in which sound is produced by inducing uniformly distributed
Distributed_mode_loudspeaker
Planned Japanese small space observatory
(Lite (Light) satellite for the studies of B-mode polarization and Inflation from cosmic background Radiation Detection) is a planned small space observatory
LiteBIRD
Thought experiment about black hole information paradox
toy model, it becomes clear that Hawking radiation corresponds to heavy modes classically. Only soft modes correspond to the Hayden–Preskill protocol
Hayden–Preskill thought experiment
Hayden–Preskill_thought_experiment
Compact astronomical body
mass via Hawking radiation. The presence of a black hole can be inferred through its interaction with matter and electromagnetic radiation such as visible
Black_hole
Range of physical processes in physics
scattering is a wide range of physical processes where moving particles or radiation of some form, such as light or sound, are forced to deflect from a straight
Scattering
Isotope of plutonium
the fuel rods. Occasionally, when an atom of 238U is exposed to neutron radiation, its nucleus will capture a neutron, changing it to 239U. This happens
Plutonium-239
Arrangement of mirrors
producing modes with certain resonance frequencies. Modes can be decomposed into longitudinal modes that differ only in frequency and transverse modes that
Optical_cavity
Aggressive type of brain cancer
disorders, such as neurofibromatosis and Li–Fraumeni syndrome, and previous radiation therapy. Glioblastomas represent 15% of all brain tumors. They are thought
Glioblastoma
Telecommunications performance metric
In antenna theory, radiation efficiency is a measure of how well a radio antenna converts the radio-frequency power accepted at its terminals into radiated
Radiation_efficiency
2015 video game
Radiation Island is an action-adventure and survival game by California-based developer Atypical Games. It was initially released on iOS and MacOS on
Radiation_Island
spectrum shows the energy distribution of the radiation incident on the detector. In multichannel scaling (MCS) mode, the MCA records a pulse count-rate over
Multichannel_analyzer
Treatment of cancer with ionized radiation
External beam radiation therapy (EBRT) is a form of radiotherapy that utilizes a high-energy collimated beam of ionizing radiation, from a source outside
External_beam_radiotherapy
Medical intervention
of acoustic radiation force was implemented as a prototype in clinical ultrasound systems and validated in vivo in 2D and 3D imaging modes. Ultrasound
Medical_ultrasound
Indian anti-radiation, air to surface missile system
supersonic and hypersonic air-to-surface (ASM) ground attack and anti-radiation missiles in development by the Defence Research and Development Organisation
Rudram_(missile)
Chinese anti-radiation missile
features SINS, GNSS, and anti-radiation seeker head. The missile has a loitering time of 50 minutes. During the loitering mode, the missile can appear as
TL-30
High-frequency radio antenna
obtained by exciting different modes of a DRA. Differently radiating modes have also been employed to generate identical radiation patterns using composite
Dielectric_resonator_antenna
Device for producing coherent EM waves in the sub-visible spectrum
term is an acronym for microwave amplification by stimulated emission of radiation. Nikolay Basov, Alexander Prokhorov and Joseph Weber introduced the concept
Maser
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