frequency and ejection of electrons

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Jina Kwon
Posts: 80
Joined: Fri Aug 09, 2019 12:15 am

frequency and ejection of electrons

Postby Jina Kwon » Fri Nov 08, 2019 11:22 am

what is the relationship between frequency and the ejection of electrons ?

AronCainBayot2K
Posts: 81
Joined: Fri Aug 30, 2019 12:17 am

Re: frequency and ejection of electrons

Postby AronCainBayot2K » Fri Nov 08, 2019 11:46 am

Based on the photoelectric effect, the ejection of electrons are determined by the frequency. If the light source has a short wavelength then it can eject electrons since the frequency would be high.

Kurtis Liang 3I
Posts: 50
Joined: Sat Aug 24, 2019 12:17 am

Re: frequency and ejection of electrons

Postby Kurtis Liang 3I » Fri Nov 08, 2019 12:08 pm

Frequency is directly proportional to the energy of the incoming light. If this energy exceeds the threshold energy for the surface, it will eject electrons.

Charisse Vu 1H
Posts: 81
Joined: Thu Jul 25, 2019 12:17 am

Re: frequency and ejection of electrons

Postby Charisse Vu 1H » Fri Nov 08, 2019 12:41 pm

The photoelectric effect states that there is a certain amount of energy (threshold energy) needed for an electron to be ejected. The frequency of the incoming photon is what determines whether an electron can be ejected. If the photon has a high enough frequency so that its energy surpasses that of the threshold energy, an electron will be ejected.

Abigail Sanders 1E
Posts: 85
Joined: Wed Sep 11, 2019 12:16 am

Re: frequency and ejection of electrons

Postby Abigail Sanders 1E » Fri Nov 08, 2019 1:59 pm

I believe that an increase in frequency is directly related with an increase in the kinetic energy in electrons ejected from a surface due to the photoelectric effect. An increase in frequency does not increase the number of elecctrons emitted, however an increase in intensity will increase the number of electrons emitted if the threshold energy is met.

Bradley Whitworth 4B
Posts: 54
Joined: Sat Jul 20, 2019 12:17 am

Re: frequency and ejection of electrons

Postby Bradley Whitworth 4B » Sun Nov 10, 2019 3:32 pm

If you know the frequency of light being directed towards a surface you can find the energy using E=hv (v is not actually the letter v it is a variable for frequency). Once the energy is known you can determine at what point that energy will overcome the work function of the surface at which point electrons will begin ejecting.

Natalie C 1K
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Joined: Wed Sep 18, 2019 12:16 am
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Re: frequency and ejection of electrons

Postby Natalie C 1K » Sun Nov 10, 2019 4:14 pm

increasing the frequency will increase the kinetic energy of ejected electrons. this is only true if the threshold energy is met

Leyna Dang 2H
Posts: 82
Joined: Thu Jul 25, 2019 12:17 am

Re: frequency and ejection of electrons

Postby Leyna Dang 2H » Sun Nov 10, 2019 4:36 pm

According to the photoelectric effect, frequency is directly proportional to the ejection of electrons. However, these electrons will only be ejected if the threshold energy is met.


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