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What (who) is absorption band - definition
Absorption band
![Absorptions bands in the [[Earth's atmosphere]] created by [[greenhouse gas]]es and the resulting effects on transmitted radiation.](https://commons.wikimedia.org/wiki/Special:FilePath/Atmospheric Transmission-en.svg?width=200 "Absorptions bands in the [[Earth's atmosphere]] created by [[greenhouse gas]]es and the resulting effects on transmitted radiation.")
RANGE ON THE ELECTROMAGNETIC SPECTRUM WHICH ARE CHARACTERISTIC OF A CERTAIN TRANSITION FROM INITIAL TO FINAL STATE IN A SUBSTANCE
According to quantum mechanics, atoms and molecules can only hold certain defined quantities of energy, or exist in specific states. When such quanta of electromagnetic radiation are emitted or absorbed by an atom or molecule, energy of the radiation changes the state of the atom or molecule from an initial state to a final state.
Incoherent broad-band cavity-enhanced absorption spectroscopy
Incoherent broad band cavity enhanced absorption spectroscopy (IBBCEAS), sometimes called broadband cavity enhanced extinction spectroscopy (IBBCEES), measures the transmission of light intensity through a stable optical cavity consisting of high reflectance mirrors (typically R>99.9%).
Absorption (acoustics)
TRANSFER OF SOUND ENERGY INTO INTERNAL ENERGY OF THE ABSORBER
Sound absorption; Acoustic insulator
Acoustic absorption refers to the process by which a material, structure, or object takes in sound energy when sound waves are encountered, as opposed to reflecting the energy. Part of the absorbed energy is transformed into heat and part is transmitted through the absorbing body.
