Photoelectric Effect

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Tiffany_Cacy_3D
Posts: 70
Joined: Fri Sep 28, 2018 12:24 am

Photoelectric Effect

Postby Tiffany_Cacy_3D » Thu Oct 11, 2018 4:36 pm

In any problem where you were using the equation E=1/2(MV2) how would you find M? Is there any way you could find the mass of the actual electrons themselves if you are given what time of element it is from? Does it just have to be given in order for you to use this equation?

Jessica Chen 1F
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

Re: Photoelectric Effect

Postby Jessica Chen 1F » Thu Oct 11, 2018 4:40 pm

Usually, if you were given the equation E=1/2MV^2, you would be asked to find V. The M in this equation is the mass of a single electron (not the sum mass of all the electrons), which is the same for all elements no matter the type of element/metal. So yes, it would have to be given and it is 9.11x10^-31kg.


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