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Emission may refer to: Emission of chemical products: * Emission of air pollutants, notably: * * Flue gas, gas exiting to the atmosphere via a flue * * Exhaust gas, flue gas generated by fuel combustion * * Emission of greenhouse gases, which absorb and emit radiation in the thermal infrared range * Emission intensity, a measure of the emission rate of a given pollutant from a given source * Emission standards, requirements that set specific limits on the amount of certain pollutants that can be released into the environment * Emissions trading, a market-based approach used to pollution control Emission of electromagnetic radiation: * Emission (electromagnetic radiation), a process by which energy is released in the form of photons * * List of light sources * Emission (radiocommunications), a radio signal (usually modulated) emitted from a radio transmitter * Emission coefficient, a coefficient in the power output per unit time of an electromagnetic source * Emission line, or "spectral line", a dark or bright line in an otherwise uniform and continuous spectrum * Emission nebula, a cloud of ionized gas emitting light of various colors * Emission spectroscopy, photoemission spectroscopy, flame emission spectroscopy and other types of spectroscopy * Emission theory, a competing theory for the special theory of relativity, explaining the results of the Michelson-Morley experiment * Emission theory (vision), the proposal that visual perception is accomplished by rays of light emitted by the eyes Other uses: * Thermionic emission, the flow of charged particles called thermions from a charged metal or a charged metal oxide surface, archaically known as the Edison effect * Ejaculation, the ejecting of semen from the penis; also, specifically: * * Nocturnal emission, ejaculation experienced during sleep * Noise emission * Exhalation of air, especially in the context of musical instruments == See also == * Emissions control (disambiguation) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Emission」の詳細全文を読む スポンサード リンク
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