Photoelectric Effect

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Jonathan Marcial Dis 1K
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Photoelectric Effect

Postby Jonathan Marcial Dis 1K » Sun Apr 22, 2018 6:47 pm

When a photon hits a metal surface, an electron is only occasionally emitted. I forget, does the energy of the photon have to be greater than or equal to the energy of the electron in order for the electron to be emitted? Thanks.

Chem_Mod
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Re: Photoelectric Effect

Postby Chem_Mod » Sun Apr 22, 2018 7:19 pm

energy of the photon has to be greater than or equal to the work function/threshold energy

Jared Pagal 1J
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Re: Photoelectric Effect

Postby Jared Pagal 1J » Sun Apr 22, 2018 7:21 pm

Yes, in order for a photon to be emitted, the energy of the incoming photon must be equal to or greater than the threshold energy (the minimum energy it takes to eject one electron). Any "excess" energy is considered the kinetic energy of the ejected electron.

Shione Nakahara 1F
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Re: Photoelectric Effect

Postby Shione Nakahara 1F » Sun Apr 22, 2018 7:46 pm

Yes, the energy of the photon has to overcome the threshhold energy, and any energy of the photon that is left over is converted to kinetic energy of the electron.

SamanthaGrohe1B
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Re: Photoelectric Effect

Postby SamanthaGrohe1B » Sun Apr 22, 2018 10:22 pm

the energy has to be greater than or equal to the threshold energy or an electron will not be emitted. by having the energy of the photon be greater or equal to the energy of the electron this excess or equivalency of energy is converted to kinetic energy that is exhibited in the emitting of the electron from the metal

Ziana Bhanji 1E
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Re: Photoelectric Effect

Postby Ziana Bhanji 1E » Sun Apr 22, 2018 10:28 pm

Yes, I agree. It has to be greater than or equal to the threshold energy

Marina Souliman 1K
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Re: Photoelectric Effect

Postby Marina Souliman 1K » Sun Apr 22, 2018 10:35 pm

The energy of the photon has to be greater or equal to the threshold energy. In the experiment, they shined UV light on metal to get an idea if its enough energy to remove an electron from the sheet. Which led us to the equation Energy (Kinetic)+ Energy (energy to remove electron)= Energy of the photon.

Cameron Smith 1I
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Re: Photoelectric Effect

Postby Cameron Smith 1I » Sun Apr 22, 2018 11:13 pm

Does the level of conductivity of the metal influence the photoelectric effect in any way?

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Re: Photoelectric Effect

Postby Chem_Mod » Mon Apr 23, 2018 9:03 pm

No. Conductivity is a material property and does not affect the work function of the metal.

Bijal Luhar
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Re: Photoelectric Effect

Postby Bijal Luhar » Tue Apr 24, 2018 2:09 pm

In order for the photon to be emitted, there must be enough energy to either exceed or equal the threshold necessary.

Alondra Juarez section 1E
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Re: Photoelectric Effect

Postby Alondra Juarez section 1E » Mon Apr 30, 2018 3:40 pm

The energy of the photon has to be either equal or greater than the energy of the electron for it to be emitted.

Maria Zamarripa 1L
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Re: Photoelectric Effect

Postby Maria Zamarripa 1L » Fri May 04, 2018 1:25 pm

It has to be at least the amount of energy of the threshold if not more.

Elana Weingord 1C
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Re: Photoelectric Effect

Postby Elana Weingord 1C » Mon May 07, 2018 7:09 pm

What was the original purpose of the photoelectric effect? (module Q20)


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