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Pre Assessment Module Question #13

Posted: Thu Oct 18, 2018 12:23 am
by Henri_de_Guzman_3L
The question asks: Does the photoelectric experiment need to be done under a vacuum? I'm reading the text and I can't seem to find it here and I don't think Dr. Lavelle explicitly mentioned it in class. My instinct is to say yes.

Re: Pre Assessment Module Question #13

Posted: Thu Oct 18, 2018 12:56 am
by Anusha 1H
I also think the answer would be yes because otherwise you can't guarantee that the photo electrons maintain their energy.
With the vacuum, you would be able to ensure the frequencies have contact with the sample and aren't influenced by collisions with the air.

Re: Pre Assessment Module Question #13

Posted: Thu Oct 18, 2018 9:41 am
by Courtney Quan 1C
I agree, I think the experiment needs to be performed underneath a vacuum so that the electrons can be detected. Without one, electrons displaced with a lower amount of kinetic energy might not necessarily be detected otherwise.