## Electrons Emitted

$c=\lambda v$

Posts: 80
Joined: Wed Sep 30, 2020 9:48 pm

### Electrons Emitted

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
Posts: 119
Joined: Wed Sep 30, 2020 9:35 pm
Been upvoted: 6 times

### Re: Electrons Emitted

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
Posts: 69
Joined: Wed Sep 30, 2020 10:07 pm

### Re: Electrons Emitted

Divide total energy by the work function

Emmeline Phu 1G
Posts: 116
Joined: Wed Sep 30, 2020 9:52 pm
Been upvoted: 2 times

### Re: Electrons Emitted

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
Posts: 67
Joined: Wed Sep 30, 2020 9:44 pm

### Re: Electrons Emitted

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
Posts: 153
Joined: Wed Sep 30, 2020 10:02 pm
Been upvoted: 3 times

### Re: Electrons Emitted

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
Posts: 50
Joined: Wed Sep 30, 2020 9:37 pm

### Re: Electrons Emitted

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

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.