 
Illustrating the Bohr Correspondence Principle©  
Glenn V. Lo Nicholls State University Thibodoux, LA 70310 United States mail to: phscgL@mail.nich.edu  
Abstract  
The goal of this document is to introduce the Bohr Correspondence Principle (BCP) in an activity immediately following the traditional lecture on the solution of the Schrodinger equation for the particleina1Dbox (PIB) problem. An incomplete threepart Mathcad document is provided to the students (BCPstudent2001.mcd). In part 1, students relate nodal features of the wavefunction to the quantum number (n) and are graphically reminded of the mathematical basis of quantization. Part 2 focuses on the interpretation of the square of the wavefunction as probability density; students are led to the conclusion that Quantum Mechanics (QM) and Classical Mechanics (CM) agree at large n. Part 3 illustrates that QM can be interpreted to agree with CM in a case that is adequately described by Kinetic Molecular Theory, which is based on CM. Students verify that n for an average He molecule in a 1dm box at 298K is, indeed, large. A completed version of the document (BCPfaculty2001.mcd) is available for teachers. The Mathcad documents were written using Mathcad 8 and can be used with higher versions of Mathcad. The pdf file is the same for all versions. The author makes use of hidden areas in the documents. These areas contain additional information or mathematical treatments as suppliments. The regions can be locked if instructors want to keep these regions hidden from students. Consult the user manual or help for details on locking regions.  
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Comments to: Glenn Lo at phscgL@mail.nich.edu  
©Copyright 2002 Journal of Chemical Education  