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Homework Help: Passing by

  1. Jun 12, 2006 #1
    I want to find out how many paricles on random move passing through a little hole ?
    There is no condition or force acting on eachof them. :biggrin: :biggrin:Thanks guys:biggrin: :biggrin:
     
  2. jcsd
  3. Jun 12, 2006 #2
    [tex]E=h\nu[/tex]

    which is the energy for one photon, then can you see what the energy of many photons is??

    [tex]E=nh\nu[/tex]

    where n is the number of photons, hence rearrage to get n,

    i presume the photons get diffracted as they go through the hole in which case

    [tex] E=\frac{nhc}{\lambda}[/tex]

    where lambda is
    [tex]\lambda=2d\sin\theta[/tex]

    because you haven't given information on what you are given ie what values you have, I will also give you this for a particle,

    [tex]E=\frac{n\hbar^{2}k^{2}}{2m}[/tex]

    where

    [tex]k=\frac{2\pi}{\lambda}[/tex]

    and as before [tex]\lambda=2d\sin\theta[/tex]



    also when asking questions, it is best to put more into them, your own workings and understanding and also a bit more in about the question, it is not easy to understand what you are asking with only 2 lines of writing

    best wishes

    Newo
     
    Last edited: Jun 12, 2006
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