Work function and kinetic energy

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Toru Fiberesima 1L
Posts: 63
Joined: Fri Apr 06, 2018 11:02 am

Work function and kinetic energy

Postby Toru Fiberesima 1L » Wed May 09, 2018 12:50 am

If the work function of A is 6x10^-19 J per atom and the work function of B were let's say 7x10^-19, wouldn't you expect A to eject a slower electron than B if the same light source shines on both. Why is this NOT the case??

Susu Le 1F
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Joined: Thu Feb 01, 2018 3:01 am
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Re: Work function and kinetic energy

Postby Susu Le 1F » Wed May 09, 2018 6:37 am

The work function of A is less than the work function of B, which means that it takes LESS energy to remove an electron from A. This also means that if the same light is shown on both, there is more excess energy that goes into the kinetic energy of the emitted electron from A than B. So, the electron from A is faster.


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