Difference between Photoelectric effect and the atomic spectra

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205296774
Posts: 66
Joined: Thu Jul 25, 2019 12:15 am

Difference between Photoelectric effect and the atomic spectra

Postby 205296774 » Wed Oct 09, 2019 3:17 pm

Hi there. During the Monday lecture, after going over the photoelectric effect, Dr. Lavelle mentioned that many students make the mistake of getting this topic confused with the atomic spectra. Could anyone further clarify it for me? I get the general gist but don't want to get them confused!

Thanks!

Vanessa Chuang 4F
Posts: 51
Joined: Sat Aug 24, 2019 12:18 am

Re: Difference between Photoelectric effect and the atomic spectra

Postby Vanessa Chuang 4F » Wed Oct 09, 2019 3:26 pm

Both of them deal with the absorption and emitting of photons. The photoelectric effect is when the electron absorbs enough energy to be completely ejected. Atomic spectra only wants to excite the electrons to observe them in an excited state, not remove them completely like the photoelectric effect.
Also, I think Dr. Lavelle mentioned that the photoelectric effect deals with metals while the atomic spectra deals with gases but I'm not completely sure if I heard him right.
Hope that helps!

205296774
Posts: 66
Joined: Thu Jul 25, 2019 12:15 am

Re: Difference between Photoelectric effect and the atomic spectra

Postby 205296774 » Wed Oct 09, 2019 7:51 pm

Ok! Thank you, this helps clarify the two a lot!

thanh24mai
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Re: Difference between Photoelectric effect and the atomic spectra

Postby thanh24mai » Wed Oct 09, 2019 11:25 pm

Thanks for asking/answering! I had the same question!


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