absorption band
[/əbˈzɔrpʃən bænd/]
nounpl: absorption bands
banda de absorção
1. A range of wavelengths or frequencies of electromagnetic radiation that is absorbed by a material, appearing as a dark band in a spectrum
The absorption band in the infrared spectrum indicates the presence of specific molecular bonds.
A banda de absorção no espectro infravermelho indica a presença de ligações moleculares específicas.
2. In spectroscopy, a region where the intensity of transmitted or reflected light decreases due to absorption by the material being studied
Scientists identified the compound by analyzing its characteristic absorption bands.
Os cientistas identificaram o composto analisando suas bandas de absorção características.
3. A dark line or region in a spectrum produced when light passes through a cooler gas or material
The hydrogen absorption band appears at specific wavelengths in stellar spectra.
A banda de absorção do hidrogênio aparece em comprimentos de onda específicos em espectros estelares.
This is a technical term primarily used in scientific and academic contexts in both Brazil and the USA. It is fundamental in chemistry, physics, and materials science courses. The term is standardized across Portuguese-speaking countries and does not vary significantly in colloquial usage as it is confined to scientific discourse.
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