1.Please give the names of the four quantum numbers used to describe all
possible electron states in an atom.
2.Without any external perturbation applied to a hydrogen atom, which(one or
more) quantum number(s) determine(s) the energy level?
3.Which electron property was discovered based on the anomalous Zeeman effect
by applying a strong magnetic field to an atom?
4.Explain two major difference in property betweena fermion and a boson.
5.Explain what causes the property of ferromagnetism in metal like iron,
cobalt and nickle.
6.Among the three statistical distribution, which one is suitable for
describing a phonon, which means the vibration of an atom in a crystalline
structure? Can many phonons stay in a single energy state?
7.What kind of motion makes the major contribution to the heat or temperature
in a solid?
8.What kind of dislocation in a metal result in the property of ductility？
How does it happen?
9.Does the following chemical process absorb energy or release energy?
Na+Cl→(Na+) +(Cl-)
10.Compare the relative strength of the ionic bond, metallic bond,covalent
bond ,and Van der Waal bond.
11.What factor makes the volum expand when water freezzes into ice?
12.Explain why diamond is an insulator and Si crystal is a semiconductor even
though they have the same crystal structure.
13.Draw a figure to demonstrate space quantization of the orbit of l=2 in an
atom under a magnetic field B in the z direction.
14.What property of a photon in the quantum theory corresponds to the
polarization characteristics of an electromagnetic wave?
15.What is the physical meaning of the Fremi energy in the Fermi-Dirac
distribution?
16.Explain what are the conduction band and valence band of a semiconductor.
17.Explain why the electron motion cannot play the major role in the
temperature of a solid except at the extremely high or low temperature.
18.Explain why it is reasonable to have nonzero electron wave function exist
inside the nucleus.
19.Please explain a general rule for the selection rule of electron transition
regarding the polarities of the wave function of the initial and final
states.
20.Please write an expression for the energy levels of a harmonic oscillator
and explain its meaning.
備註：此為電機系第一志願的期末考題，研所聽說會從裡面出
[ 本帖最後由 max1130 於 2008-4-4 15:21 編輯 ] |
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