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Atomic Absorption Spectroscopy versus Atomic Emission Spectroscopy

Posted: Thu Oct 18, 2018 2:16 am
by Nathan Tran 4K
Hi, I need help with the following question on the module:

13. In the above experiment if only the absorbed wavelengths of light are detected what is the experiment called? What is the spectrum called?

I know this is a question about the definition but why is it not:


A. Atomic absorption spectroscopy; Emission line spectrum?

Re: Atomic Absorption Spectroscopy versus Atomic Emission Spectroscopy

Posted: Thu Oct 18, 2018 10:38 am
by Seohyun Park 1L
Since you are detecting the light that is absorbed by the substance, the spectrum would be an absorption spectrum as you are seeing which wavelengths of light are being absorbed (hence the name absorption spectroscopy). If you were detecting the light emitted by a substance, then it would be the emission spectrum.

Re: Atomic Absorption Spectroscopy versus Atomic Emission Spectroscopy

Posted: Thu Oct 18, 2018 9:19 pm
by Catherine Kim 3K
The atomic absorption spectroscopy part is correct. Yet, the emission line spectrum would be the answer to an experiment where only emitted wavelengths of light are detected.

Re: Atomic Absorption Spectroscopy versus Atomic Emission Spectroscopy

Posted: Fri Oct 19, 2018 2:34 am
by Karina Koo 2H
Since the experiment is detecting absorbed light not emitted light, its just called absorption line spectrum. It shows what wavelengths are absorbed not which ones are emitted.