Photoelectric Effect Module Question 18  [ENDORSED]

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Catherine Yang 3G
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Photoelectric Effect Module Question 18

Postby Catherine Yang 3G » Wed Oct 11, 2017 11:08 pm

Question 18 reads: In the photoelectric effect what condition must occur for an electron to be emitted from a metal surface?
The answer is both C and D:

C. E (photon) = E (remove e-)

D. E (photon) > E (remove e-)

Why is the answer not just C? At the bare minimum, doesn't the energy of the photon have to be equal to the energy required to remove the electron? Or is the question asking for all the conditions that can occur for an electron to be emitted?

Ya Gao
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Re: Photoelectric Effect Module Question 18  [ENDORSED]

Postby Ya Gao » Wed Oct 11, 2017 11:23 pm

I think this question is asking for all the conditions that apply to the situation. Since electrons can be ejected when the energy of the photon is equal or greater than the energy needed to remove the electron which is work function, so choice B and C both are correct.

204918982
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Re: Photoelectric Effect Module Question 18

Postby 204918982 » Thu Oct 12, 2017 5:14 pm

Yes the question is asking for all the conditions that apply so C and D are both right since the energy of the photon can be equal to or greater than the energy needed to remove the electron.

Catherine Yang 3G
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Re: Photoelectric Effect Module Question 18

Postby Catherine Yang 3G » Fri Oct 13, 2017 3:47 pm

Thank you!


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