Work Function

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Work Function

Postby thanh24mai » Wed Oct 09, 2019 11:24 pm

Can someone explain what work function is? And is work function and the term threshold energy used interchangeably?

Michael Nguyen 1E
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Joined: Sat Aug 17, 2019 12:17 am

Re: Work Function

Postby Michael Nguyen 1E » Wed Oct 09, 2019 11:28 pm

Essentially, the work function and the threshold energy are the same. They both represent the amount of energy needed to remove an electron from a particular element. However, the term "work function" is typically given in units of energy per mole of electrons and needs to be converted to just the energy for a single electron using Avogadro's number.

Michelle Le 1J
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Joined: Fri Aug 09, 2019 12:16 am

Re: Work Function

Postby Michelle Le 1J » Wed Oct 09, 2019 11:34 pm

Work function and threshold energy are basically the same thing; it's the minimum energy needed to eject an electron from a certain metal. If the the energy of the light does not meet the threshold energy, then no electrons will be emitted regardless of intensity of light.

Matthew ILG 1L
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Joined: Sat Aug 17, 2019 12:15 am

Re: Work Function

Postby Matthew ILG 1L » Thu Oct 10, 2019 6:38 pm

It seemed to me that during the lecture Dr. Lavelle was using "Work Function" and "Threshold Energy" fairly interchangeably.

Doreen Liu 4D
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Joined: Wed Sep 11, 2019 12:17 am

Re: Work Function

Postby Doreen Liu 4D » Thu Oct 10, 2019 9:17 pm

The work function is in the energy of photons equation. It is the threshold energy which is the minimum energy needed to free electrons from a certain metal.

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