Electrons Emitted


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Maddie Turk Disc 2J
Posts: 80
Joined: Wed Sep 30, 2020 9:48 pm

Electrons Emitted

Postby Maddie Turk Disc 2J » Wed Oct 21, 2020 11:34 am

Hello,
I am having some issues with calculating the maximum number of electrons emitted at a certain amount of total energy. I had no problem finding the work function, but from there how do I calculate the electrons emitted.
Thank you!

sophie esherick 3H
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Re: Electrons Emitted

Postby sophie esherick 3H » Wed Oct 21, 2020 11:40 am

Usually the maximum number of electrons that can be emitted is equal to the amount of photons (assuming that each photon has enough energy to emit an electron). Therefore to find the maximum amount of electrons, you should divide the total amount of energy by the energy per photon to find the amount of photons. I hope this helped!

Brendan Duong 1I
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Joined: Wed Sep 30, 2020 10:07 pm

Re: Electrons Emitted

Postby Brendan Duong 1I » Wed Oct 21, 2020 11:41 am

Divide total energy by the work function

Emmeline Phu 1G
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Re: Electrons Emitted

Postby Emmeline Phu 1G » Wed Oct 21, 2020 11:46 am

Hi! In order to find the maximum number of electrons emitted, remember that one photon usually correlates to one electron under the assumption that one photon has enough energy to eject an electron from the metal surface. Energy is usually calculated in the units J/photon; therefore, in order to find the maximum number of electrons emitted divide the total energy by the J/photon to find the maximum number of electrons emitted. Hope this helps! :)

Jasraj Parmar 3H
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Joined: Wed Sep 30, 2020 9:44 pm

Re: Electrons Emitted

Postby Jasraj Parmar 3H » Wed Oct 21, 2020 11:47 am

The maximum number of electrons that are released would be the total amount of energy divided by the work function. The work function is the minimum amount of energy that is required to release an electron from the surface of a metal.

Inderpal Singh 2L
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Re: Electrons Emitted

Postby Inderpal Singh 2L » Wed Oct 21, 2020 1:20 pm

I had trouble with this as well, all you have to do is divide the total energy by the work function. Take into account what the problem might have already given you.

Haochen He 3L
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Joined: Wed Sep 30, 2020 9:37 pm

Re: Electrons Emitted

Postby Haochen He 3L » Thu Oct 22, 2020 8:55 pm

Hi! The number of electrons emitted is maximized when their kinetic energy equal to 0. So you just need to divide the total energy by the work funtion.

Moura Girgis 1F
Posts: 96
Joined: Wed Sep 30, 2020 10:00 pm

Re: Electrons Emitted

Postby Moura Girgis 1F » Thu Oct 22, 2020 10:23 pm

Since kinetic energy would be 0 in this scenario, you would just have to divide the total energy by the work function, taking into account whatever is already given to you or whatever you have previously solved in the problem.


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