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Emission

Act of giving off radiant energy by an atom or molecule.

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emission
Science; General science

Energy or matter that is released from something. Rays of light from the Sun and exhaust from the car's engine are both emissions.

emission
Aerospace; Satellites

With respect to electromagnetic radiation, the process by which a body emits electromagnetic radiation as a consequence of its kinetic temperature only.

emissivity
Aerospace; Satellites

Ratio of radiation emitted by a surface to the radiation emitted by a black body at the same temperature under similar conditions. May be expressed as total emissivity (for all ...

emissivity
Earth science; Physical oceanography

The ratio of the emittance from a body to that of a black body emitter at the same temperature, i.e. the degree to which a real body approaches a black body radiator.

emissivity
Engineering; Electronic engineering

For a radiating source, the ratio W 1/ W 2, where W 1 is the energy emitted by the source at a particular temperature, and W 2 is the energy emitted by a blackbody (i.e., a ...

Absorb
Industrial machinery; Laser equipment

To transform radiant energy into a different form accompanied by a rise in temperature.

Absorption Coefficient
Industrial machinery; Laser equipment

Factor describing light's ability to be absorbed per unit of path length.

Accessible Emission
Industrial machinery; Laser equipment

The magnitude of accessible laser (or other collateral) radiation of a specific wavelength or emission duration at a particular point as measured by appropriate methods and ...

Accessible Emission Limit
Industrial machinery; Laser equipment

The maximum accessible emission level limit (AEL) permitted within a particular class. In ANSI Z-136.1, AEL is determined as the product of Accessible Emission times the Maximum ...

Active Medium
Industrial machinery; Laser equipment

Collection of atoms or molecules capable of undergoing stimulated emission at a given wavelength.

Afocal
Industrial machinery; Laser equipment

Literally, "without a focal length"; an optical system with its object and image point at infinity.

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