Photoelectric Effect Equation

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Venya Vaddi 1L
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Joined: Fri Sep 28, 2018 12:16 am
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Photoelectric Effect Equation

Postby Venya Vaddi 1L » Thu Oct 11, 2018 8:56 pm

Can someone explain the condition E(photon) >= E(energy to remove e-) that was covered in lecture on Monday?

Swetha Ampabathina1I
Posts: 64
Joined: Fri Sep 28, 2018 12:18 am

Re: Photoelectric Effect Equation

Postby Swetha Ampabathina1I » Thu Oct 11, 2018 9:00 pm

It's basically saying that one photon must have enough energy to remove one electron and if it doesn't than it cannot remove that electron. However, if it does have enough energy or more energy then it can remove the electron and the rest of the energy will become kinetic energy.

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Joined: Fri Sep 28, 2018 12:16 am

Re: Photoelectric Effect Equation

Postby 2c_britneyly » Thu Oct 11, 2018 9:41 pm

I think Dr. Lavelle explained this using an example of hurdles. If someone doesn't have enough energy, then they will not be able to successfully jump over the hurdle. Similarly, if a photon does not have enough energy, then we say it does not meet the threshold energy, and therefore cannot remove an electron.

Diana Bibireata 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

Re: Photoelectric Effect Equation

Postby Diana Bibireata 1B » Thu Oct 11, 2018 10:00 pm

Essentially each photon needs to have more energy than than the energy to remove an electron from the metal (aka the threshold energy). So if 1000 photons hit the metal surface and each individual photon has enough energy, then 1000 electrons will be released.

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