Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I Unit and dimension about De broglie wave

  1. Apr 19, 2016 #1
    From the de Broglie wave formula we know,

    In actual examples of course the answer would be 'something [meters]'

    I am having hardtime to understand how unit of h/mv
    [J*s]/[kg]*[m/s] turn into wavelength unit

    I studied the Mass-Energy relation part earlier,
    But still can't get the precise way how actually it works and modifes its unit.
  2. jcsd
  3. Apr 19, 2016 #2


    User Avatar
    Science Advisor
    Homework Helper

    What is 1 Joule, expressed in SI base units?
  4. Apr 19, 2016 #3
    Planck's constant is h -its units are joule-sec;
    Joule is expressed as energy - its units are kg.m^2.s ^-2 ; so j--s will be kg.m^2.s^-1
    so h/ p will be kg.m^2.s^-1 /(kg.m.s^-1 ) = m (in meters) which is the unit of Lambda the wavelength.
  5. Apr 19, 2016 #4
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Unit and dimension about De broglie wave
  1. De Broglie Wavelength? (Replies: 4)