Problem_set_1 - Physics 560 Homework problem set 1 1. A&M...

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Physics 560 Homework problem set 1 1. A&M Problem 1, Chapter 1. 2. A&M Problem 2, Chapter 1. 3. A&M Problem 3, Chapter 1. 4. Recall  4 1 i    , where is the conductivity derived from the valence electrons. This expression was derived assuming that the positive cores of the atoms were fixed. Since the cores can move (or be polarized), a better expression is   4 c i  , where c is the dielectric function derived from the core polarization. (a) Calculate the threshold wavelengths below which the alkali metals become transparent. Use c = 1.02, 1.07, 1.17, 1.27, and 1.31 for Li, Na, K, Rb, and Cs, respectively, and assume 1  for the range of wavelengths of interest. Compare your results with experimental values. Are your results in better agreement with the experimental values than those obtained by assuming
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This note was uploaded on 03/21/2012 for the course PHYS 560 taught by Professor Flynn during the Spring '08 term at University of Illinois, Urbana Champaign.

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