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Capacity of an object to radiate electromagnetic energy
However, the most commonly used form of emissivity is the hemispherical total emissivity, which considers emissions as totaled over all wavelengths, directions
Emissivity
Topics referred to by the same term
Look up emission in Wiktionary, the free dictionary. Emission may refer to: Emission of air pollutants, notably: Flue gas, gas exiting to the atmosphere
Emission
State of low thermal energy
Low emissivity (low e or low thermal emissivity) refers to a surface condition that emits low levels of radiant thermal (heat) energy. All materials absorb
Low_emissivity
Infrared imaging used to reveal temperature
silver, with an emissivity coefficient of 0.02. An example of a substance with high emissivity would be asphalt, with an emissivity coefficient of .98
Thermography
Electromagnetic radiation generated by the thermal motion of particles
body's emission relative to that of a black body is the body's emissivity, so a black body has an emissivity of one. The absorptivity, emissivity, reflectivity
Thermal_radiation
Thermally induced flow of charge carriers from a surface
electron emission is specifically the emission of electrons and occurs when thermal energy overcomes the material's work function. After emission, an opposite
Thermionic_emission
Frequencies of light emitted by atoms or chemical compounds
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to electrons making
Emission_spectrum
Physical law on the emissive power of black body
\varepsilon } is the emissivity of the surface emitting the radiation. The emissivity is generally between zero and one. An emissivity of one corresponds
Stefan–Boltzmann_law
Planned NASA orbiter mission to Venus
composition, thermal emissivity, and gravity fields. Onboard the spacecraft will be two scientific instruments, the Venus Emissivity Mapper (VEM) and Venus
VERITAS_(spacecraft)
Law of wavelength-specific emission and absorption
thermodynamic equilibrium, the emissivity function is equal to the absorptivity function. Kirchhoff's law has another corollary: the emissivity cannot exceed one (because
Kirchhoff's law of thermal radiation
Kirchhoff's_law_of_thermal_radiation
Idealized physical body that absorbs all incident electromagnetic radiation
emissivity—of black-body energy levels. By definition, a black body in thermal equilibrium has an emissivity ε = 1. A source with a lower emissivity,
Black_body
Legal requirements governing air pollutants released into the atmosphere
Emission standards are the legal requirements governing air pollutants released into the atmosphere. Emission standards set quantitative limits on the
Emission_standard
Greenhouse gases emitted from human activities
Greenhouse gas emissions (GHG emissions) from human activities intensify the greenhouse effect which contributes to climate change. Carbon dioxide (CO2)
Greenhouse_gas_emissions
Calculated property of a star or planet
temperature when the body's emissivity curve (as a function of wavelength) is not known. When the star's or planet's net emissivity in the relevant wavelength
Effective_temperature
Spontaneous sleep orgasm
ejaculation (nocturnal emission) and orgasm for a male, and vaginal lubrication and/or orgasm for a female. Nocturnal emissions can happen after dreams
Nocturnal_emission
A zero emission engine, motor, process, or other energy source emits no waste products that pollute the environment or disrupt the climate. Vehicles and
Zero_emission
Form of electromagnetic radiation
differing emissivity. For example, for any pre-set emissivity value, objects with higher emissivity will appear hotter, and those with a lower emissivity will
Infrared
English industrial music band
Nocturnal Emissions is Nigel Ayers's sound art project that has released numerous records and CDs in music styles ranging from electro-acoustic, musique
Nocturnal_Emissions
Topics referred to by the same term
Emissions control may refer to: EMCON, military state of minimal radio emissions Technology involved in vehicle emissions control Regulation of air pollution
Emissions_control
Thermal electromagnetic radiation
ideal emission would be. The emissivity of a material specifies how well a real body radiates energy as compared with a black body. This emissivity depends
Black-body_radiation
Sources of methane gas in Earth's atmosphere
Sources of methane emissions due to human activity (year 2020 estimates) Fossil Fuel Use (33.0%) Animal Agriculture (30.0%) Plant Agriculture (18.0%)
Methane_emissions
Type of radioactive decay
Positron emission, beta plus decay, or β+ decay is a subtype of radioactive decay called beta decay, in which a proton inside a radionuclide nucleus is
Positron_emission
Quantum mechanical state change
Spontaneous emission is the process in which a quantum mechanical system (such as a molecule, an atom or a subatomic particle) transitions from an excited
Spontaneous_emission
Thermometer which infers temperature by measuring infrared energy emission
reflective surfaces have lower emissivity than non-reflective surfaces.[citation needed] Some sensors have an adjustable emissivity setting, which can be set
Infrared_thermometer
Device that emits light via optical amplification
stimulated emission of electromagnetic radiation. The word laser originated as an acronym for light amplification by stimulated emission of radiation
Laser
Spectrometer for mapping the surface composition of Venus
The Venus Emissivity Mapper (VEM) is a spectrometer for mapping the surface composition of Venus through a distinct number of atmospheric spectral windows
Venus_Emissivity_Mapper
Emission rate of a pollutant
An emission intensity (also carbon intensity or C.I.) is the emission rate of a given pollutant relative to the intensity of a specific activity, or an
Emission_intensity
list of sovereign states and territories by per capita carbon dioxide emissions due to certain forms of human activity, based on the EDGAR database created
List of countries by carbon dioxide emissions per capita
List_of_countries_by_carbon_dioxide_emissions_per_capita
Semen discharge from the male reproductive tract
development. Ejaculation can occur spontaneously during sleep (a nocturnal emission or "wet dream") or in rare cases because of prostatic disease. Anejaculation
Ejaculation
Component to protect against excessive heat
(high thermal resistance), high emissivity, and good thermal stability (refractoriness). Porous ceramics with high emissivity coatings (HECs) are often employed
Heat_shield
When a particle's interactions with a material cause it to emit new particles
In particle physics, secondary emission is a phenomenon where primary incident particles of sufficient energy, when hitting a surface or passing through
Secondary_emission
Measure of electromagnetic energy
calculated by dividing the brightness temperature by the emissivity of the surface. Since the emissivity is a value between 0 and 1, the real temperature will
Brightness_temperature
2010s diesel emissions scandal involving Volkswagen
The Volkswagen emissions scandal, sometimes known as Dieselgate or Emissionsgate, began in September 2015, when the United States Environmental Protection
Volkswagen_emissions_scandal
Type of radioactive decay
Proton emission (also known as proton radioactivity) is a rare type of radioactive decay in which a proton is ejected from a nucleus. Proton emission can
Proton_emission
Vehicle emission standards
The European emission standards are vehicle emission standards that regulate pollution from the use of new land surface vehicles sold in the European
European_emission_standards
Technique in experimental physics
Emission channeling is an experimental technique for identifying the position of short-lived radioactive atoms in the lattice of a single crystal. When
Emission_channeling
Building material that reflects thermal radiation and reduces heat transfer
called emissivity (also called "emittance"). Emissivity is expressed as a number between zero and one at a given wavelength. The higher the emissivity, the
Radiant_barrier
Fifth planet from the Sun
{\displaystyle {\ce {H3+}}} emission, and it is known that density is the dominant controller of its resulting emission. The "Great 'Cold' Spot" is one
Jupiter
information limited because of the large-scale variability due to the emissivity of sea ice. Satellite microwave data (and visible, infrared data depending
Sea_ice_emissivity_modelling
Film installed on glass surfaces
(IR or radiant heat). To keep the sun's heat out of the house, a low-emissivity coating should be applied to the outside pane of glazed windows. If the
Window_film
Topics referred to by the same term
Emission theory may refer to: Emission theory (relativity), a former competing theory for the special theory of relativity Emission theory (vision), a
Emission_theory
Topics referred to by the same term
Emissions reduction can refer to: Climate change mitigation Air pollution control Certified emission reduction Emission reduction unit This disambiguation
Emissions_reduction
Energy transfer mechanism which enables planetary cooling
Stefan–Boltzmann constant, and ϵ {\displaystyle \epsilon } is the emissivity. The emissivity is a value between zero and one which indicates how much less
Outgoing_longwave_radiation
Capacity of an object to reflect light
efficiency. Bidirectional reflectance distribution function Colorimetry Emissivity Lambert's cosine law Transmittance Sun path Light Reflectance Value Albedo
Reflectance
Physical model of propagating energy
emissions are known in spectral bands other than visible light. Delayed emission is called phosphorescence. Quantum mechanics also governs emission,
Electromagnetic_radiation
This is a list of sovereign states and territories by carbon dioxide emissions due to certain forms of human activity, based on the EDGAR database created
List of countries by carbon dioxide emissions
List_of_countries_by_carbon_dioxide_emissions
Thermal emittance or thermal emissivity ( ε {\displaystyle \varepsilon } ) is the ratio of the radiant emittance of heat of a specific object or surface
Thermal_emittance
Nasal emission is the abnormal passing of oral air through a cleft palate, or from some other type of velopharyngeal inadequacy (VPI), during the production
Nasal_emission
American multinational oil and gas company
2024, ExxonMobil was responsible for 610 Mt of CO2 emissions, which was 1.58% of global CO2 emissions. Originally, Vacuum Oil Company was founded in 1866
ExxonMobil
Type of radioactive decay
Neutron emission is a mode of radioactive decay in which one or more neutrons are ejected from a nucleus. It occurs in the most neutron-rich/proton-deficient
Neutron_emission
Emission of electrons induced by an electrostatic field
Field electron emission, also known as field-induced electron emission, field emission (FE) and electron field emission, is the emission of electrons from
Field_electron_emission
Distinctive narrow spectral feature of chemical species
region in an otherwise uniform and continuous spectrum. It may result from emission or absorption of light in a narrow frequency range, compared with the nearby
Spectral_line
Market-based approach used to control pollution
Emissions trading is a market-oriented approach to controlling pollution by providing economic incentives for reducing the emissions of pollutants. The
Emissions_trading
Type of thermometer sensing radiation
that problems existed with relying on knowledge of the value of emissivity. Emissivity was found to change, often drastically, with surface roughness,
Pyrometer
Heat-trapping gas in an atmosphere
This high rate of warming is caused by a combination of greenhouse gas emissions being at an all-time high of 53.6±5.2 Gt CO2e per year over the last decade
Greenhouse_gas
Rate of human-caused greenhouse gas emissions
Global net-zero emissions are reached when greenhouse gas emissions and removals due to human activities are in balance. Net-zero emissions is often shortened
Net-zero_emissions
American multinational food and beverage corporation
contributing to global plastic pollution, significant carbon dioxide emissions, and poor product nutrition. In 2024, PepsiCo was the second-highest producer
PepsiCo
Elastic stress waves in a solid
Acoustic emission (AE) is the phenomenon of radiation of acoustic (elastic) waves in solids that occurs when a material undergoes irreversible changes
Acoustic_emission
Radio frequency not deliberately created
In radio communication, a spurious emission is any component of a radiated radio frequency signal, the complete suppression of which, would not impair
Spurious_emission
Thermal insulation using several thin layers
outer space, held at a fixed temperature of 300 K (27 °C; 80 °F), with an emissivity of 1, facing away from the sun or other heat sources. From the Stefan–Boltzmann
Multi-layer_insulation
Study of reducing the emissions produced by motor vehicles
Vehicle emissions control is the study of reducing the emissions produced by motor vehicles, especially internal combustion engines. The primary emissions studied
Vehicle_emissions_control
Infrared technology developed by NASA
High Emissivity Aluminiferous Luminescent Substrate, or HEALS, is an infrared technology developed by NASA. Originally developed as part of experiments
High Emissivity Aluminiferous Luminescent Substrate
High_Emissivity_Aluminiferous_Luminescent_Substrate
Human-caused changes to climate on Earth
warming, as the warming impact of greenhouse gas emissions was offset by cooling from sulfur dioxide emissions. Sulfur dioxide causes acid rain, but it also
Climate_change
Colourless non-flammable greenhouse gas
with an impact comparable to that of CFCs. About 40% of human-caused emissions are from agriculture, as nitrogen fertilisers are digested into nitrous
Nitrous_oxide
Nebula formed of ionized gases that emit light of various wavelengths
An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy ultraviolet
Emission_nebula
Type of radioactive decay
proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron
Beta_decay
Sound from the inner ear
An otoacoustic emission (OAE) is a sound that is generated from within the inner ear. Having been predicted by Austrian astrophysicist Thomas Gold in 1948
Otoacoustic_emission
Atmospheric optical phenomenon, which appears as a light ribbon in the sky
The backronym later adopted for the phenomenon is the Strong Thermal Emission Velocity Enhancement. According to analysis of satellite data from the
STEVE
Vehicle propelled fully or mostly by electricity
output versus lead-acid batteries—has revived public interest as zero-emission vehicle options. Manufacturers mostly switched to hybrids that use internal
Electric_vehicle
Part of a wall or window, made of glass
The strategy to reduce radiation involves coating the glass with a low-emissivity (Low-E) coating, which reflects away much of the infrared light that hits
Glazing_(window)
Type of display device
either photo-emissive (photoluminescent) or electro-emissive (electroluminescent) allowing them to be readily incorporated into new emissive display architectures
Quantum_dot_display
Branded engine design
September 2015 had an emissions defeat device, which activated emissions controls only during emissions testing. The emissions controls were suppressed
TDI_(engine)
Device for producing coherent EM waves in the sub-visible spectrum
through amplification by stimulated emission. The term is an acronym for microwave amplification by stimulated emission of radiation. Nikolay Basov, Alexander
Maser
Emission of electrons when electromagnetic radiation hits a material
The photoelectric effect is the emission of electrons from a material caused by electromagnetic radiation such as ultraviolet light. Electrons emitted
Photoelectric_effect
Storage space for water
gases than in temperate regions. The following table indicates reservoir emissions in milligrams per square meter per day for different bodies of water.
Reservoir
Ejection of an electron from the surface of matter, or atomic nucleus
In physics, electron emission is the ejection of an electron from the surface of matter, or, in beta decay (β− decay), where a beta particle (a fast energetic
Electron_emission
Release of a photon triggered by another
Stimulated emission is the process by which an incoming photon of a specific frequency can interact with an excited atomic electron (or other excited molecular
Stimulated_emission
Capturing image data across multiple electromagnetic spectrum ranges
brightness of the image produced by a thermal imager depends on the objects emissivity and temperature. Every material has an infrared signature that aids in
Multispectral_imaging
Chemical compound
of MoSi2 alongside its high emissivity make this material, alongside WSi2 attractive for applications as a high emissivity coatings in heat shields for
Molybdenum_disilicide
President Obama's environmental agenda prioritized the reduction of carbon emissions through the use of renewable energy with the goal of conserving the environment
Environmental policy of the first Trump administration
Environmental_policy_of_the_first_Trump_administration
Cooling of air in an enclosed space
TWh by 2050, and that with the progress currently seen, greenhouse gas emissions attributable to space cooling would double from 1,135 million tons (2016)
Air_conditioning
Gases emitted as a result of fuel reactions in combustion engines
pattern called an exhaust plume. It is a major component of motor vehicle emissions (and from stationary internal combustion engines), which can also include
Exhaust_gas
Quantitative methods used to simulate climate
Earth emissivity. The effective emissivity also gauges the strength of the atmospheric greenhouse effect, since it is the ratio of the thermal emissions escaping
Climate_model
Measure of greenhouse gas emissions
emissions is to measure the embedded emissions of goods that are being consumed (also referred to as "embodied emissions", "embodied carbon emissions"
Embedded_emissions
Multimedia delivery method
rely on revenue based on views or attendance. The net greenhouse gas emissions from streaming music were estimated at between 0.2 and 0.35 million metric
Streaming_media
Loss of heat by thermal radiation
the use of surfaces that are highly reflective and have high thermal emissivity to reduce the temperature of a building or other object. It has been proposed
Radiative_cooling
Analytical technique used in materials science
Field-emission microscopy (FEM) is an analytical technique that is used in materials science to study the surfaces of needle apexes. The FEM was invented
Field-emission_microscopy
Approach to limit climate change
Carbon emission trading (also called carbon market, emission trading scheme (ETS) or cap and trade) is a type of emissions trading scheme designed for
Carbon_emission_trading
Accounting for pollution
An emission inventory (or emissions inventory) is an accounting of the amount of pollutants discharged into the atmosphere. An emission inventory usually
Emission_inventory
Light source for infrared spectroscopy
that the emissivity of a SiC Globar between a wavelength of 0.65µm and 14.9µm ranged between 0.70 and 0.84. In 2007, research on the emissivity of Globar
Globar
Saudi Arabian state-owned petroleum company
responsible for more CO2 emissions than any other entity, being responsible for 1,653 Mt CO2 emissions, or 4.28% of global CO2 emissions. Saudi Aramco's origins
Saudi_Aramco
Unintended release of gases
Fugitive emissions are leaks and other irregular releases of gases or vapors from a pressurized containment – such as appliances, storage tanks, pipelines
Fugitive_emission
Physical phenomenon
in an atom is filled by an electron, releasing energy that causes the emission of another electron from a different shell of the same atom. When a core
Auger_effect
Type of electromagnetic radiation
processes such as atoms in a maser emitting microwave photons, radio wave emission and absorption is usually regarded as a continuous classical process, governed
Radio_wave
Glass that allows people on one side to see those on the other but not vice versa
including the Toronto Rocket Smaller versions are sometimes used in: Low-emissivity windows on vehicles and buildings Mobile phone and tablet screen covers
One-way_mirror
Tax on carbon emissions
the carbon emissions from producing goods and services. Carbon taxes are intended to make visible the hidden social costs of carbon emissions. They are
Carbon_tax
Type of overhead power line conductor
conductor, the emissivity for heat radiation and the absorption of sunlight increases. Conductor coatings are available that have a high emissivity for high
Aluminium-conductor steel-reinforced cable
Aluminium-conductor_steel-reinforced_cable
Medical imaging technique
Positron emission tomography (PET) is a functional imaging technique that uses radioactive substances known as radiotracers to visualize and measure changes
Positron_emission_tomography
Voluntary Emission Reductions or Verified Emission Reductions (VERs) are a type of carbon offset exchanged in the voluntary or over-the-counter market
Voluntary_Emission_Reduction
Management strategy for global warming
radiative cooling. The fabric achieved 94.5% emissivity and 92.4% reflectivity. This combination of high emissivity and reflectivity is central to its cooling
Passive daytime radiative cooling
Passive_daytime_radiative_cooling
EMISSIVITY
EMISSIVITY
EMISSIVITY
EMISSIVITY
Girl/Female
Tamil
From a good family
Boy/Male
Indian
Instrument to level something
Surname or Lastname
English
English : variant of Job.South German : from the personal name, either a derivative of Hiob, the German form of Job, or a reduced form of Jakob.
Boy/Male
Indian
Who fought in the early wars of Islam
Boy/Male
Hindu
The Sun, Expert or skilled
Girl/Female
American, Australian, British, Christian, Dutch, English, German, Greek, Irish, Italian, Spanish
Light; Form of Eleanor; Sun-ray; Shinning Light; Variant of Helen; Foreign
Girl/Female
Indian
Innocent
Boy/Male
Bengali, Indian, Kannada, Tamil
Another Name for God Murugan
Boy/Male
Hindu, Indian
Have Good Think; Faith
Boy/Male
Arabic, Hindu, Indian
Sweeper
EMISSIVITY
EMISSIVITY
EMISSIVITY
EMISSIVITY
EMISSIVITY
n.
Tendency to emission; comparative facility of emission, or rate at which emission takes place, as of heat from the surface of a heated body.