Atomic Spectra: absorption vs emission

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Shirley Liu 2I
Posts: 64
Joined: Fri Sep 28, 2018 12:16 am

Atomic Spectra: absorption vs emission

Postby Shirley Liu 2I » Sat Oct 20, 2018 10:44 pm

Does the absorption spectrum line have the same frequency as the lines in the emission spectra, or are they reversed or negative values instead?

Tarika Gujral 1K
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

Re: Atomic Spectra: absorption vs emission

Postby Tarika Gujral 1K » Sun Oct 21, 2018 1:25 pm

I believe frequencies in absorption and emission spectra would be different. For example, if red light is absorbed, green light would be given off, and red and green have different frequencies.

lindsey_ammann_4E
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Joined: Fri Sep 28, 2018 12:26 am

Re: Atomic Spectra: absorption vs emission

Postby lindsey_ammann_4E » Sun Oct 21, 2018 2:23 pm

As far as I know, the electrons must still jump up or down an energy level, but there is the same energy difference between each. So absorption would be +eV, and emission would be the same amount but -eV.

Chem_Mod
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Re: Atomic Spectra: absorption vs emission

Postby Chem_Mod » Sun Oct 21, 2018 2:50 pm

They are different, typically emitted light is given off with a lower energy than the absorbed light (longer wavelength).


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