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date: 13 October 2019

absorption 

Source:
A Dictionary of Electronics and Electrical Engineering
Author(s):

Andrew Butterfield,

John Szymanski

1. Attenuation of a radiowave due to dissipation of its energy, as by the production of heat.2. Attenuation of a beam of light by a crystal due to localized vibrational modes in the crystal resulting from the presence of impurity atoms. This gives rise to characteristic sharp troughs in the transmission or reflection spectra and can be used to analyse the material. Absorption can also occur due to photon-induced electron transitions between different energy bands in a semiconductor and can be used to determine the energy gap.... ...

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