equation for the photoelectric effect

Moderators: Chem_Mod, Chem_Admin

Zuri Smith 1A
Posts: 34
Joined: Fri Apr 06, 2018 11:05 am

equation for the photoelectric effect

Postby Zuri Smith 1A » Mon Apr 23, 2018 10:02 pm

In class, I remember Dr. Lavelle describing the equation for the Photoelectric Effect as being:
E(photon) = hv = Work - 1/2mv^2. However, as I am trying to complete some of the problems in the book, the equation that is often used says "Work PLUS KE", rather than "Work MINUS KE". Did I write this down wrong in class or am I forgetting something?

annie_finneran_1K
Posts: 37
Joined: Fri Apr 06, 2018 11:02 am

Re: equation for the photoelectric effect

Postby annie_finneran_1K » Mon Apr 23, 2018 10:11 pm

work plus KE is what you use to figure out the energy of the photon if you are given work function and velocity of the electron that was ejected.


photon energy minus KE is what you use to figure out work function/minimum light needed to eject an electron. hope that helps!


Return to “Photoelectric Effect”

Who is online

Users browsing this forum: No registered users and 2 guests