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

Energy in QM

  1. Jun 20, 2007 #1
    What is the difference between formulas E=p^2/2m and E= hf ?
     
  2. jcsd
  3. Jun 20, 2007 #2
    You cannot understand a formula without its context. The first E in reality means: Energy of a non-relativistic, non-interacting, classical particle. The second E refers to the energy of a non-interacting, quantum photon.
     
  4. Jun 20, 2007 #3

    mjsd

    User Avatar
    Homework Helper

    p^2/2m is non-relativistic kinetic energy
    E=hf usually means total energy of a photon
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?