Recent content by Mjdgard

  1. M

    Boltzmann factor and partition function

    I got a problem by finding an proper explanation. The Boltzmann factor is defined as P_j=\frac{1}{Z}e^{-\beta E_j} I know, this is a probability distribution. but what exactly does it mean? Wikipedia says: "The probability Pj that the system occupies microstate j" (link) But that doesen...
  2. M

    Electro magnetic wave and light

    Thanks brewnog. This means, the maxwell equations are valid for light-waves too; ok, that's not very surprising for me. But that an x-ray could be described as a photon stream is very interesting.
  3. M

    Electro magnetic wave and light

    Hi What is the difference between light (photons) and electromagnetic waves (eg radio waves)? According to some tables (like this ) the only difference is its wave length. But to me this doesen't make sense! i learned, that a photon just acts like a wave. furthermore a photon has got a mass...
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