Work function

Moderators: Chem_Mod, Chem_Admin

rkang00
Posts: 69
Joined: Fri Sep 28, 2018 12:25 am

Work function

Postby rkang00 » Thu Oct 11, 2018 1:22 am

In the lecture, there's a constant reference to 'work function'. What is that, is that the threshold energy with a circle-with-a-line-through-it as a symbol?

A De Castro 14B 2H
Posts: 75
Joined: Fri Sep 28, 2018 12:29 am

Re: Work function

Postby A De Castro 14B 2H » Thu Oct 11, 2018 1:26 am

Hi, there are slight differences between the definitions of "work function" and "threshold energy." You can refer to this viewtopic.php?t=15646 for explanations.

Phil Timoteo 1K
Posts: 101
Joined: Fri Apr 06, 2018 11:05 am

Re: Work function

Postby Phil Timoteo 1K » Thu Oct 11, 2018 1:40 am

In class Professor Lavelle referred to work function as the threshold energy, or the energy required to emit an electron.

janessadai 1F
Posts: 14
Joined: Fri Sep 28, 2018 12:18 am

Re: Work function

Postby janessadai 1F » Thu Oct 11, 2018 3:47 pm

I think they are interchangeable when calculating with the equation even though they have slight differences. (work function is the energy that needs to be put in, while threshold energy is the frequency required to eject an electron)

Emilee Hosking 1D
Posts: 32
Joined: Fri Sep 28, 2018 12:17 am

Re: Work function

Postby Emilee Hosking 1D » Thu Oct 11, 2018 4:35 pm

What is the equation for the work function and the phi symbol? Is the phi a constant?

Meghanhe1l
Posts: 60
Joined: Fri Sep 28, 2018 12:17 am

Re: Work function

Postby Meghanhe1l » Thu Oct 11, 2018 5:42 pm

Energy of photon + Energy to remove election = Kinetic energy of ejected election
hv-(circle with a slash, which is the work function or threshold energy) = 0.5mv^2

cristinapadilla_1E
Posts: 33
Joined: Fri Sep 28, 2018 12:18 am

Re: Work function

Postby cristinapadilla_1E » Thu Oct 11, 2018 5:44 pm

Work function, also known threshold energy, is the minimum energy required to release an electron.

Athena L 1B
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: Work function

Postby Athena L 1B » Fri Oct 12, 2018 8:38 pm

The work function also depends on the metal being tested - different metals have different work functions, or minimum amount of energy needed to remove an electron from the surface.


Return to “Photoelectric Effect”

Who is online

Users browsing this forum: No registered users and 2 guests