How do we use the work function to find energy?

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How do we use the work function to find energy?

Postby Chem_Mod » Thu Aug 25, 2011 9:58 am

Question: How do we use the work function to find energy?

Chem_Mod
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Re: How do we use the work function to find energy?

Postby Chem_Mod » Thu Aug 25, 2011 9:59 am

Answer: The work function is determined from the kinetic energy (Ek) of the ejected photon and the energy of the light (hv) applied to the system. Ek=hv-(work function) We can rearrange this to: work function=hv-Ek. Determine the frequency, multiply it by Plank's constant to determine the energy of the photon, subtract the kinetic energy and you are left with energy equal to the work function.


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