Objectives and Homework for September 16, 2004.
[1] Understand the photoelectric effect, and be able to explain what it implies about light.
[2] Know what an antiparticle is, and realize that all particles observed thus far have associated antiparticles. Realize that a particle may be its own antiparticle, but recognize that this puts serious constraints on its quantum numbers.
[3] Understand J. J. Thomson's "plum pudding" model of the atom, and be able to explain how it failed experimentally.
[4] Know the results of Rutherford's scattering of alpha particles off of gold foils, and understand what they imply about atomic structure.
[5] Know what is meant by Rutherford scattering, and understand how Rutherford derived his results.
[6] Understand the concepts of "impact parameter", "scattering angle", "cross section", and "differential cross section" as applied to scattering.
[7] Be able to apply Rutherford's scattering equation. Realize that the total cross section for Rutherford scattering is infinite, and be able to explain why.
[8] Be able to reproduce the derivation of the classical atomic model (the "planetary model") for Hydrogen (or for any ion having only 1 electron). Realize that in this model all atoms are unstable, and be able to explain why. Know the approximate atomic lifetime for Hydrogen as predicted by this model.
[9] Be able to explain the modifications that Bohr made to the classical atomic model, and understand how these lead to the correct Hydrogen spectrum, including a derivation of the Rydberg constant.
Homework due Friday, September 17, 2004 [Repeat…].
[1] Finish Reading Chapter 3 in Thornton and Rex.
[2] Do Problems 27, 32, 36, 38, 40, & 47 (pp. 116-117) at the end of Chapter 3 in Thornton and Rex.