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Homework Help: Quantum Effect

  1. Dec 11, 2008 #1
    1. The problem statement, all variables and given/known data

    Consider the box potential
    V (x) = 0 0 < x < a
    1 elsewhere

    a) Estimate the energies of the ground state as well as those of the First and second
    excited states for
    i) an electron enclosed in a box of size a = 10E-10 m. Express your answer in
    electron volts.
    ii) a 1 g metallic sphere which is moving in box of size a = 10 cm. Express your
    answer in joules.
    b) Discuss the importance of quantum effects for both these two systems.

    2. Relevant equations

    E1 = ((h)^2 ) / ( 8 * m * L ^2)

    En = n^2 * E1

    3. The attempt at a solution

    The First problem is , I am not sure about L(Length) . Is this equal to the size of the box 'a' in part i and ii.

    The Second Problem is how can i define the importantance of quantum effect (b) .. I mean should i have to define with the varying size what change i am observing in Energy Levels .
  2. jcsd
  3. Dec 11, 2008 #2
    May be i have to put this one in Advance Physics Sections :-)
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