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!

The significance of each term in Planck's Radiation Formula

  1. Mar 31, 2017 #1
    1. The problem statement, all variables and given/known data

    I(λ, T) is 4 pieces multiplied: (8π/λ4) (hc/λ) (1/(ehc/λkT-1) (c/4).

    1. Identify the meaning of each term.
    2. Which term(s) fix the ultraviolet catastrophe?

    3. The attempt at a solution

    Well I know that the energy of a photon is given by (hc/λ), and I'm fairly certain it was Planck who introduced the ehc/λkT-1 term to reconcile the ultraviolet catastrophe, but that's about it. I've been looking through Planck's derivation and I am quite overwhelmed by the statistical analysis required.
  2. jcsd
  3. Apr 1, 2017 #2


    User Avatar
    2017 Award

    Staff: Mentor

    Well, you identified two out of four terms. One is just a constant.
    You have the probability that state is occupied and you have the energy of a photon in this state, but what about the "number" of states?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted