electron with no KE in reality

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Chloe Qiao 4C
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am

electron with no KE in reality

Postby Chloe Qiao 4C » Fri Oct 12, 2018 9:38 am

I understand how electrons behave in experiments when energy of the incoming light equals to its threshold energy, but can someone explain what it is like in reality when the ejected electron has no kinetic energy?

taryn_baldus2E
Posts: 62
Joined: Fri Sep 28, 2018 12:24 am

Re: electron with no KE in reality

Postby taryn_baldus2E » Fri Oct 12, 2018 10:10 am

If an electron has no kinetic energy, then there was still enough energy in the incoming light to remove the electron from the metal. Because the threshold used up all of the energy, there is no excess or kinetic energy that would allow the electron to move from its current position to another.

AustinGrove3B
Posts: 53
Joined: Fri Sep 28, 2018 12:23 am

Re: electron with no KE in reality

Postby AustinGrove3B » Fri Oct 12, 2018 10:12 am

The energy would be enough to break the electron away from its atom, but it wouldnt be ejected away from it. So essentially it broke the electron's attraction to the atom but it is still there;.


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