Rate at which electrons are emitted

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Diane Kang 2F
Posts: 33
Joined: Thu Sep 27, 2018 11:18 pm

Rate at which electrons are emitted

Postby Diane Kang 2F » Wed Oct 31, 2018 11:17 pm

What are some factors that can manipulate the rate at which electrons are emitted? And why exactly doesn't the energy of the incoming photon affect the rate of electron emission from the metal plate?

Courtney Quan 1C
Posts: 48
Joined: Thu Sep 27, 2018 11:26 pm
Been upvoted: 2 times

Re: Rate at which electrons are emitted

Postby Courtney Quan 1C » Thu Nov 01, 2018 8:35 am

Hi! If by rate you mean the number of electrons emitted per a given time, the light's intensity would affect that rather than the energy. Intensity is linked to the number of photons, so a higher intensity would result in more photons. As long as the energy of each photon is greater than or equal to the work function of the electron (so that the electron CAN be displaced), more electrons will be emitted by increasing the intensity. Per the one photon:one electron interaction, intensity increases the number of photons and increasing the intensity will displace more electrons because more photons will be present as long as the energy of the photon is greater than or equal to the work function of the electron. Therefore, increasing the intensity of the light would eject more electrons than that same light with a lower intensity. The energy of the photon doesn't affect this because the energy is what determines whether or not a single photon will displace a single photon, rather than affecting the number of electrons emitted. Hope this helps!

Sarah Jeong 4F
Posts: 30
Joined: Thu Sep 27, 2018 11:27 pm

Re: Rate at which electrons are emitted

Postby Sarah Jeong 4F » Thu Nov 01, 2018 10:35 am

Basically if you are over the threshold level, then increasing the intensity(#of electrons), will increase the rate of the electrons that are emitted.


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