MSE 421/521 Structural Characterization
MSE 421/521
Spring 2016
Dr. Rick Ubic
Homework assignment 1
Due 8 February 2016
Structure
1. Define the terms lattice system, crystal system, Bravais lattice, point group, and
space group.
10
MSE 421/521 Structural Characterization
Waves
2. (a) Define the wavelength, frequency, amplitude, and intensity of a wave.
8
(b) State the relationship between amplitude and intensity of a wave.
2
(c) State the relationship between wavelength and frequency of an electromagnetic
wave traveling in a vacuum.
2
(d) At what velocity does an electro-magnetic wave travel in general (be careful)?
3. How is x-radiation generated naturally?
4
4
MSE 421/521 Structural Characterization
4. (a) KBSX broadcasts on 91.5 MHz. What is the wavelength of the broadcast wave
and its energy per photon?
8
(b) What is the energy per photon of an x-ray with λ = 1.04nm?
2
(c) How does the energy of the photon in (a) compare with that in (b)?
1
MSE 421/521 Structural Characterization
Particles as waves
5. For an electron accelerated by each of the following voltages:
i) Calculate its velocity, expressed in ms-1 and as a percentage of the speed of
light in vacuum.
ii) Calculate its kinetic energy in both J and eV.
iii) Calculate its wavelength in Å.
(a) For an accelerating voltage of 20 kV
6
(b) For an accelerating voltage of 100 kV
6
(c) For an accelerating voltage of 400 kV
6
MSE 421/521 Structural Characterization
Atomic Structure
6. What is the Pauli exclusion principle? How does it affect electrons in the outside
electron shells of an atom in a solid material?
7
7. For the element aluminium (atomic number 13):(a) List all the electrons in the atom using the spdf and IUPAC notations.
4
(b) List all the possible x-ray emissions using both Siegbahn and IUPAC notations.
You might want to consult the on-line class notes available at:
http://coen.boisestate.edu/rickubic/files/2015/11/Notes-II-Properties-of-Waves.pdf
30