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!

Check Answer

  1. Apr 30, 2009 #1
    http://img11.imageshack.us/img11/2179/question1.jpg [Broken]
    Answer was 4.054 x 10^-15

    http://img404.imageshack.us/img404/601/question2.jpg [Broken]
    Answer was 52.2226
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. May 1, 2009 #2
    hmm as you can probably see your value for plancks constant is way off what it should be! Out of interest could you show us how you came about that value?
    Also we should need the work function of the metallic surface in order to calculate h.
    Again could you please show working for the second problem, that way we can see any mistakes you may have made as i got different answers to you for both problems =]
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook