emitância
1. The quality or property of emitting or radiating energy, light, or particles; the measure of thermal radiation emitted by a surface
The emittance of the material determines how much heat it radiates at a given temperature.
A emitância do material determina quanto calor ele irradia em uma determinada temperatura.
2. In physics, the fraction of radiation emitted by a surface compared to that of an ideal black body at the same temperature
Engineers calculated the emittance value to optimize the thermal performance of the satellite.
Os engenheiros calcularam o valor de emitância para otimizar o desempenho térmico do satélite.
3. In particle physics, a measure of the spread of a beam of particles in phase space
The electron beam's emittance affects the resolution of the microscope.
A emitância do feixe de elétrons afeta a resolução do microscópio.
Emittance is primarily a technical term used in physics, engineering, and materials science. It is rarely used in casual conversation and appears mainly in academic papers, engineering specifications, and scientific discussions. The term is consistent across English-speaking countries and Brazilian Portuguese, with no significant regional variations in meaning or usage.
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