binding energy

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Katherine Wu 1H
Posts: 104
Joined: Fri Aug 30, 2019 12:15 am
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binding energy

Postby Katherine Wu 1H » Tue Nov 05, 2019 4:19 pm

An x-ray photon of wavelength 0.989 nm strikes a surface. The emitted electron has a kinetic energy of 969 eV. (1 eV = 1.602 10^-19 J)

Is the binding energy in the question referring to the electron's threshold energy or something else?

Tiffany_Chen 2K
Posts: 106
Joined: Fri Aug 30, 2019 12:15 am

Re: binding energy

Postby Tiffany_Chen 2K » Tue Nov 05, 2019 5:48 pm

Yes, it refers to threshold energy (energy to remove the e- from the metal surface).

CMaduno_1L
Posts: 102
Joined: Wed Sep 18, 2019 12:18 am

Re: binding energy

Postby CMaduno_1L » Tue Nov 05, 2019 11:07 pm

Yes, but this should not be confused with the ionization energy. Ionization energy is the energy required to remove an electron from a different state of matter, which is not the same as removing it form a metal surface.

quresh3E
Posts: 36
Joined: Wed Sep 18, 2019 12:17 am

Re: binding energy

Postby quresh3E » Tue Nov 12, 2019 2:05 pm

Yes, the binding energy refers to the threshold energy.


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