This monograph is written within the framework of the quantum mechanical
paradigm. It is modest in scope in that it is restricted to some
observations and solved illustrative problems not readily available in
any of the many standard (and several excellent) texts or books with
solved problems that have been written on this subject. Additionally a
few more or less standard problems are included for continuity and
purposes of comparison. The hope is that the points made and problems
solved will give the student some additional insights and a better grasp
of this fascinating but mathematically somewhat involved branch of
physics. The hundred and fourteen problems discussed have intentionally
been chosen to involve a minimum of technical complexity while still
illustrating the consequences of the quantum-mechanical formalism.
Concerning notation, useful expressions are displayed in rectangular
boxes while calculational details which one may wish to skip are
included in square brackets. Beirut HARRY A. MAVROMATIS June, 1985 IX
Preface to Second Edition More than five years have passed since I
prepared the first edition of this mono- graph. The present revised
edition is more attractive in layout than its predecessor, and most, if
not all of the errors in the original edition (many of which were kindly
pointed out by reviewers, colleagues, and students) have now been
corrected. Additionally the material in the original fourteen chapters
has been extended with significant additions to Chapters 8, 13, and 14.