Empirical Equation

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

Empirical Equation

Postby Emilee Hosking 1D » Thu Oct 11, 2018 4:23 pm

In my notes from 10-10-18, I have that "E(photon)=threshold energy +E(kinetic)"
Is threshold energy a constant that I should memorize, or will it be a value that is given in the problem/I will be asked to solve for?

Amy Lefley 1J
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: Empirical Equation

Postby Amy Lefley 1J » Thu Oct 11, 2018 4:27 pm

The threshold energy differs with each metal used. So for different problems using the same metal, the work function or threshold energy would remain the same.

Niveda_B_3I
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Empirical Equation

Postby Niveda_B_3I » Thu Oct 11, 2018 5:47 pm

The threshold energy differs between various metals, just like the spectra for different elements is different. This is because the change in energy from level to level is different depending on the element.

Josephine Lu 4L
Posts: 62
Joined: Fri Sep 28, 2018 12:18 am

Re: Empirical Equation

Postby Josephine Lu 4L » Thu Oct 11, 2018 6:00 pm

Is work function the same thing as threshold energy?

Chem_Mod
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Re: Empirical Equation

Postby Chem_Mod » Thu Oct 11, 2018 6:36 pm

Josephine Lu 1L wrote:Is work function the same thing as threshold energy?


Yes, they both refer to the energy required to emit an electron from the metal surface.


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