Photoelectric Effect clarification question

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Gabrielle Schwab 1G
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Photoelectric Effect clarification question

Postby Gabrielle Schwab 1G » Tue Sep 29, 2015 3:23 pm

So in the lecture on Monday we discussed the photoelectric effect and I was wondering if someone could tell me if I have the concept down correctly. So if we were looking at light as a wave, changing the intensity/ amplitude of light did not produce electrons. However, looking at light as particles, changing the intensity/ amount of photons of light did in fact produce electrons. Is this correct?

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Re: Photoelectric Effect clarification question

Postby Chem_Mod » Tue Sep 29, 2015 4:44 pm

If light acted as a wave in respect to intensity, we would expect that more electrons would be ejected and the kinetic energy of the electron would increase.

However, when we increased the intensity of light as we discussed on Monday, it had no effect on the number of electrons ejected. This is consistent with the idea of light having a particle form since intensity would only increase the number of photons and not their individual energy. As we discussed, we found that increasing the frequency of light, and not its intensity, increased the number of photons ejected and their kinetic energy.

Gabrielle Schwab 1G
Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

Re: Photoelectric Effect clarification question

Postby Gabrielle Schwab 1G » Wed Sep 30, 2015 7:02 am

That makes much more sense. Thank you very much.


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