1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Photo electric effect relate to determining the charge of an electron?

  1. Dec 8, 2003 #1
    how does the photo electric effect relate to determining the charge of an electron?
  2. jcsd
  3. Dec 9, 2003 #2
    I'm not sure that it does.

    The photoelectric effect is where incident photons have sufficient energy to knock electrons out of their captured state - ie ionise the material. Charge is irrelevant here.
  4. Dec 9, 2003 #3
    If we apply formula for Photoelectric effect i.e.

    [tex]k_{max}=E_{photon}-\phi(work function of metal)[/tex]

    now if we are able to stop the fastest moving electron with cuttoff voltage such that [tex]eV_0 = K_{max}[/tex]
    so we can calculate e from above equation

    But i'm not sure whether this is applied for charge calculation
    Last edited: Dec 9, 2003
  5. Dec 9, 2003 #4


    User Avatar
    Science Advisor

    The classic experiment for determination of electron charge is the Milliken Oil Drop Experiment. Or, as I call it, the Milliken Eye-strain Experiment.

  6. Dec 10, 2003 #5
    Yes its true classical method was developed by Milikan

    But i read somewhere that he manipulated with his readings , is there any controversy
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook